Below 45 Degrees in Marietta: Consider Winter Tires

Remember snow tires? They were basically just regular tires with big, knobby lugs to get them through deep snow. They were loud and rode hard, and Marietta drivers couldn’t wait to get them off the car. Then along came television advertisements for “all-season” radials. GEORGIA auto owners ran out and bought some and we thought we were done with snow tires forever.

Tires have come a long way since then. Modern winter tires sold in the Atlanta area are much better designed for the wide range of dangerous conditions that come with GEORGIA winter weather. They are made with a rubber compound that helps them stay flexible in cold weather. Regular tires become hard and stiff at Marietta temperatures below 45°F, which reduces their traction. That’s a critical concern in winter, especially with snowy or wet Marietta conditions. But it also means that Marietta motorists are better off with winter tires in cold weather even when it’s dry.

The tread design on winter tires has been improved to actually move snow, slush and water. The lugs and grooves actually throw packed snow out of the tread as the tire rotates. This means the tread is open and ready to move more snow when it rolls around again. Summer tires can actually pack up with snow, which makes them more detrimental than a bald tire.

Many winter tires use a micro-pore compound that lets the tire bite into ice and snow. They have wider grooves around the tire that help expel snow. They have a rounder casing to better cut into the surface of snow. Modern winter tires available at GEORGIA tire shops also have sipes, or thin slits cut into the tread. The edges of these sipes can grab ice and snow so that the tire retains traction on almost any surface. The sipes also help to expel water and slush from the tread. In short, a lot of time and engineering has gone into improving winter tires.

The all-season tire that is popular among Atlanta drivers is actually a compromise between summer and winter performance. This means they give adequate performance for Marietta motorists in either season, but aren’t great in either. Summer tires give great performance in hot weather, but lousy performance in winter. Marietta drivers need to put more thought into their tire choices these days, but that also means they get a lot better performance for their bucks.

If you want the performance that new winter tires can give you, you should have them properly installed at your Marietta service center or Aero Automotive. It’s best to purchase four snow tires and put them on all the wheels of your vehicle. But if you only want two, you need to put them on the rear of your vehicle, even if you drive a front-wheel drive vehicle. Marietta car owners always want to put the tires with the best traction on the rear of the vehicle.

Imagine this: You take a corner on an icy Atlanta road and your rear end starts to slide. What happened is that the front end slowed for the turn, but the rear end hasn’t figured that out yet. If you have high-traction tires on the front of your vehicle, that makes the problem worse. You’re slowing the front end faster and harder, which makes the back end fishtail even more.

Putting the higher traction tires on the rear will give Marietta car owners more control for turns, regardless of the type of vehicle driven. Of course, that makes putting high-traction tires on all of your wheels even smarter. Why not give all of your tires the best traction they can get? Some Marietta assume that four-wheel drive or all-wheel drive vehicles only need winter tires on two wheels. Why? Doesn’t it make sense to give all four wheels the same level of traction and control? Four-wheel or all-wheel drive cannot compensate for poor traction.

Another false assumption held by many Marietta auto owners is that if you have traction control and anti-lock brakes, you won’t need winter tires. Traction is important for good acceleration, steering and stopping. And tires provide traction. Traction control and anti-lock brakes can only improve on that traction. The better the traction, the better the traction control and anti-lock brakes will work. In other words, the better the tires, the better those systems will work for Marietta drivers.

A Canadian law requires all passenger vehicles, rental cars and taxis registered in Quebec to have winter tires on all four wheels from November 15th until April 1st.

If you’re shopping for winter tires and live where there is a lot of snow in GEORGIA, look for a mountain with a snowflake in it molded into the tire’s sidewall. This symbol means the tire complies with severe snow standards. All-season tires have an M&S stamped on the sidewall. M&S stands for mud and snow.

For more essential auto advice about tires for any GEORGIA season, talk to your honest Aero Automotive tire professional. They can help you settle upon the right tire for your area and for your driving needs. For the best performance from your tires, whatever the season, don’t forget preventive maintenance. Keep your tires up to pressure for best durability, safety and performance, but don’t overinflate them. Remember, good car care provides the safest road for all of us Marietta car owners.

How Much is Enough for Atlanta Auto Owners? Tire Tread Depth

Most Atlanta motorists know that tires wear out and that the wear has to do with tread depth. Most of us have heard that “bald” tires are dangerous, but most of us picture a tire with no tread at all when we think of a bald tire. And when we take our vehicles in for preventive maintenance, the technician tells us they’re need to be replaced long before all the tread is worn off. Just how much tire tread wear is too much? And how can you tell? Tires are expensive and their condition is important to the safe handling of a vehicle, so it’s vital for Atlanta auto owners to know the answers to these questions.

First of all, it’s essential to understand that there may be a legal limit to tread wear. If your tires are worn past this limit, you have to replace them to be in compliance with GEORGIA auto safety laws. That’s why measuring your tread wear is part of a vehicle safety inspection.

In some jurisdictions, tread must be at least 1.6 millimeters or 2/32 of an inch thick. This standard has been in effect since 1968. But this standard has recently been called into question, and some Marietta motorists are arguing that it be changed.

The safety issue that has brought this standard under scrutiny is the ability of a vehicle to stop on a wet surface. When a vehicle has trouble stopping, most Marietta motorists immediately look at the brakes as the source of the problem. But tires are crucial to safe stopping distances because they provide the traction required in a stop.

A tire’s contact with the road surface creates traction, which allows for effective braking. On a wet surface, a tire only has traction if it can get to the road’s surface. So tire tread is designed to channel water out from under the tire to allow it to stay in contact with the road. If the tire can’t shift the water, then it starts to “float.” This condition is called hydroplaning. It is very dangerous for Marietta auto owners since the vehicle won’t stop no matter how hard the driver presses the brakes. Steering control is also lost.

A recent study tested the stopping ability of a passenger car and a full-sized pick-up on a road surface covered with only a dime’s depth of water (less than a millimeter). The vehicles were traveling at 70 mph (112 kph) when they stopped on the wet surface. At 2/32 tread depth, the stopping distance was double that of a new tire. The passenger car was still traveling at 55 mph when it reached the stopping distance it experienced with new tires.

Let’s suppose that you’re on a busy Atlanta freeway in a light drizzle and a vehicle stops suddenly in front of you. You just bought new tires and you brake hard, missing the vehicle with only inches to spare. If you hadn’t bought those new tires, you would have crashed into that vehicle at 55 mph. That is a major difference.

What if your tires had a tread depth of 4/32? You would have crashed into that vehicle at 45 mph. Still not a good situation. But it’s better.

Now what if you were driving that pick-up truck? You wouldn’t have missed that vehicle in the first place, and you would have crashed at higher rates of speed in both of the other scenarios. The heavier your vehicle, the longer its stopping distance. It’s a matter of physics.

The results of this test has led Consumer Reports and others to ask that the standard for tread wear from 2/32 to 4/32. The increased standard will improve safety on the road and save lives here in GEORGIA and nationally.

Of course, until the standard changes, you’ll have to decide whether you’ll be willing to replace your tires a little sooner.

You can use a quarter to tell if your tread wear is down to 4/32. Place the quarter into the tread with George’s head toward the tire and his neck toward you. If the tread doesn’t cover George’s hairline, you’re under 4/32. With a Canadian quarter, the tread should cover the digits of the year.

You can measure the 2/32 tread wear with a penny. If the tread touches the top of Abe’s head, it’s at 2/32. Tires are a significant item for Marietta auto owners when it comes to car care. But their condition has a major impact on safety. We need to decide whether to sacrifice safety for economy. Keeping our tread wear above 4/32 is good auto advice.

Saving Lives In Marietta With Tire Pressure



All new passenger vehicles on our Marietta GEORGIA roads now have tire pressure monitoring systemsTPMS for short. They are designed to alert you if your tires are under inflated. Since they are fairly new, a lot of people have questions about TPMS.

First off, the most important thing is that you still need to check your tire pressure every week – or at least every time you gas up. The TPMS system alert comes in when your tire is twenty percent below the factory recommendation. So if the recommended pressure is thirty five pounds per square inch, the TPMS warning won’t come on until the pressure is at twenty eight pounds. That’s significantly under-inflated. Enough to raise safety concerns.

The worst is tire failure. A severely under inflated tire can overheat and fail. Also, handling degrades to the point that you may not be able to steer out of trouble. Also under-inflated tires wear out faster and they waste fuel. So it’s costly to not stay on top of proper inflation.

What’s the practical value of the TPMS system? Well, it’s twofold. First, it can alert you when your tire is losing pressure due to a puncture or a bent rim. That’s an important warning that you might not have gotten until next time you gassed up.

The second is that we all occasionally forget to check our tire pressure. So it’s a failsafe system to let you know there’s a problem brewing.

Other things can cause your TPMS system to go off. The system also monitors itself. The sensors that are mounted in the wheels have little batteries that send a signal to the monitor. The batteries go dead over time and the TPMS system will let you know. And the sensors could break. Also road salt from our Marietta GEORGIA roads can ruin them.

There’s also a hassle factor that your Marietta GEORGIA tire center has to contend with. For example, when you have your tires rotated in Marietta, the TPMS system has to be re-calibrated so that it knows which tire is on which corner of the car. Same is true for when you have new tires or winter tires installed. Flat repairs, as well.

That takes extra time. And it requires the right equipment and training. Special – and expensive – tire change machines need to be used with some sensors. It’s all complicated by the fact that there are a number of different TPMS systems in use so the tire professionals at Aero Automotive need equipment and training for each kind. Tire centers have had to raise the price of some of these basic services to offset their increased costs.

Also if you add custom wheels on your suv, you need to put in new TPMS sensors if your originals won’t work on the new rims. If you don’t your TPMS light will be on constantly and you won’t have the benefit of the warning system.

All in all, the mandated TPMS systems will save lives, so they’re worth the added hassle and expense.

Aero Automotive Advice On Buying New Tires

Today’s tires and wheels offer a lot of options for every Marietta driver’s style, habits and driving conditions.

Tires are designed for high-performance in winter or summer and even come in a long-wearing variety for all GEORGIA seasons.

Marietta off-roaders should be excited about the options available to them as well. The tread on off-road tires is designed to handle the wear from bumps and rocks. The tires’ high profile protects rims from damage.

But what if you own an SUV but aren’t interested in off-roading around Marietta? You can change out those high-profile beasts for a lower, wider look if it suits your style.

Aero Automotive tire professionals can offer great auto advice on how to choose tires that match your needs and style.

The same goes for wheels. When Marietta car owners shop for new wheels, they can be hard-pressed to make a selection from the thousands of styles available at GEORGIA tire stores. If they choose a wheel that is the same size as the ones that came with their vehicle, they can get them changed out and get back on the road, no worries. But if they change the wheel size, then they may need to make some critical adjustments to their vehicle.

Upsizing a wheel may mean changing the suspension on the suv. The wheel and tire need to fit inside the wheel well without any rubbing during turns or when driving over bumps. Rubbing can cause uneven tire wear and even damage the tires or cause safety issues.

Upsizing wheels also increases the unsprung weight of the vehicle which has a major impact on braking performance. The larger wheels increase rotational inertia, as well, which translates to longer stopping distance and lower brake performance. Upsized wheels may require upgraded brakes. Further, wheel size is used to calculate the speed and mileage of a vehicle. Changing wheel size will cause the speedometer and odometer to give inaccurate readings unless the vehicle’s computer is re-programmed to compensate for the difference.

So if you want to customize your suv with new wheels, you should consult with a wheel and tire professional at Aero Automotive in Marietta to ensure you get the style you want without sacrificing safety or performance — and without damaging your vehicle.

If you just need to purchase new tires, a tire professional can also help you select the tires that are best for your driving needs and habits. The right tires will protect you and your suv on the road.

So personalize your vehicle, but don’t forget that good car care will keep that sassy ride on the road in Marietta a lot longer.

Winter Tires



What type of technology do you use? Do you prefer an 8-track tape or an iPod? When it comes to winter tires, much of Marietta drivers’s perception dates back to when 8-track was the best way to listen to the Bee Gees.

Twenty years ago in Marietta, winter tires differed from highway tires only in their tread design. Marietta motorists called them snow tires back then and they had big, knobby lugs that were designed to give good traction in deep snow. They had the same rubber compound as regular tires and they weren’t very good on ice, packed snow or wet GEORGIA roads. They were not even very good on dry roads. They really helped in deep or loose snow, but they did a poor job the rest of the time. They were loud and rode hard. Marietta auto owners couldn’t wait to get them off in the spring.

Then all-season tires started to appear in Marietta tire shops. All-season tires are really a compromise between summer and winter performance. They have acceptable hot weather ride and tread life, and can get Marietta auto owners through mild winter road conditions OK. But there are some really good reasons to consider winter tires.

Modern winter tires do a terrific job for Marietta car owners in a wide range of GEORGIA winter conditions. First of all, below 45 degrees Fahrenheit, regular tires become hard and inflexible. That means they don’t provide the road grip Marietta motorists need. Even if you don’t live somewhere in GEORGIA with a lot of snow, but it still gets below 45 degrees in the winter, you will be safer with winter tires.

In addition, they are specifically designed to more effectively move snow and water. That’s the key to traction on ice, packed snow and wet  Atlanta area roads. They use a micro-pore compound that allows the tire to bite into ice and snow. They also use wider grooves that run around the circumference of the tread to expel snow from the tire better. The lugs and grooves on winter tires have a special shape that throws the packed snow out of the tread as the tire turns. The tread is then open when it comes back in contact with the road and can provide good traction for GEORGIA drivers.

Winter tires also have a lot of sipes. Sipes are thin slits in the tread. The edge of the sipes grab ice and packed snow to provide tons of traction and to expel water and slush out of the tread. Winter tires have a rounder casing to cut into the snow’s surface. The treads on regular summer tires can actually get packed with snow instead and become very slick. Winter tires offer 25% to 50% more traction for Marietta motorists than all-season tires. And when it comes to stopping power, all-season tires take 42% longer to stop than winter tires. Sometimes that’s the difference between getting home safely and spending the night in a snow bank.

Now back when the 8-track was king, Marietta auto owners just put snow tires on the drive wheels. That worked out OK because the rubber compound was essentially the same. Now, winter tires provide so much more traction than all-season or summer tires, that there’s a huge difference between the traction at the front and rear ends of the car if you only put winter tires on the drive wheels.

For example: if you take a corner on an icy road and the rear end starts to slide out, essentially the rear is trying to pass the front because it’s going faster. If you have high traction winter tires only on the front, they are going to be much more effective at transferring cornering grip and stopping power to the front wheels. This will actually cause the rear end to whip out even more.

That’s why tire manufactures instruct their dealers that they must install winter tires on the rear wheels as well whenever they put winter tires on the front end of any vehicle. It’s a major safety concern. Marietta car owners are strongly recommended that winter tires be installed on all four wheels on rear wheel drive vehicles as well. The front tires do most of the steering and braking work – it only makes sense that you provide the front end with the best traction you can.

Marietta motorists often assume that if they have four-wheel drive or all-wheel drive they don’t need winter tires on all four wheels. Would you intentionally disconnect the four-wheel drive in poor road conditions? Of course you wouldn’t, but that’s essentially what you do if you only put winter tires on one end. It only makes sense to have the same level of traction and control at all four corners.

The province of Quebec in Canada has issued a law requiring all passenger vehicles, taxis and rental cars with Quebec license plates to install a full set of four winter tires between November 15th and April 1. It’s that important.

Many modern cars have traction control and anti-lock brakes so Marietta motorists may think that they don’t need winter tires. But you need traction to accelerate, steer and stop. The tires provide the traction so that the traction control and anti-lock brakes have something to work with.

Look for tires with the symbol of a mountain with a snowflake in it. This means the tire complies with the severe snow standard. Marietta all-season tires will have an M&S, for mud and snow, on the sidewall.

So when the Marietta temperatures drop below 45 degrees, be sure you have a set of four winter tires for maximum performance in snow, packed snow, ice, wet and dry roads. Your honest Aero Automotive tire professional can help you find the right winter tire for your vehicle and driving needs.

Marietta GEORGIA Winter Prep Service For Your Auto



When winter approaches in Marietta GEORGIA, we break out the sweaters, coats, boots and mittens. We want to be ready for winter conditions. Your vehicle needs to be ready for winter as well. The last thing you want is to get stranded out in the cold. You need your vehicle to be safe and reliable. It’s a good idea to get caught up on any neglected maintenance items anytime – but the stakes are higher in the winter.

There are some specific things that we need to do in Marietta GEORGIA to have our vehicle ready for winter. The most obvious is having the antifreeze checked. If the antifreeze level is too low, it can’t properly protect your engine, radiator and hoses from freezing. If your car does not seem to be making enough heat to keep you warm, your antifreeze level may be low or you could have a thermostat problem. Get it checked out. If you are due for a cooling system service, now is a perfect time to have it done.

In the cold months around Marietta we always worry about being able to stop in time when it’s slick out. The first thing to remember is to slow down and allow yourself plenty of room to stop. Of course, you want your brakes to be working properly. A thorough brake inspection will reveal if the pads or any other parts need replacing. Check with your service consultant to see if it is time to replace your brake fluid. It accumulates water over time which really messes with your stopping power.

It is a really good idea to have your battery tested. A battery’s cranking power really drops with the temperature. If your battery is weak in the fall, it may not be up to winter. There is nothing like a dead battery in a snow storm.

Which leads us to an emergency kit. You should always have a blanket or something to keep you and your passengers warm if you get stranded. If you will be venturing away from civilization, pack more items such as food and water to help you survive. Keeping at least half a tank of gas is a good precaution if you get stuck and need to run the car to keep warm and it will help keep your gas lines from freezing up.

Aero Automotive
4725 Canton Rd.
Marietta, GEORGIA 30066
770-926-9050

Winter in Marietta GEORGIA always makes us think of our windshield wiper blades – usually during that first storm when they aren’t working right. That’s why it’s a really good idea to replace your blades in the fall before the winter storms. If you live where there’s a lot of snow and ice, you might want a special winter blade that resists freezing up. And be sure to have enough windshield washer fluid.

The final thing to consider is your tires. Any tire can lose pressure over time – up to one pound every six or eight weeks. For every 10 degrees the temperature drops you lose another pound of pressure. So if it was 80 degrees outside when you checked your tire pressure two months ago and now it’s 40 degrees out, you could be down 5 pounds of pressure. That’s enough to be a real safety issue and it wastes gas too. You may need special winter tires as well. Your tire professional can help you find the right tire design for your expected road conditions.

If you’re getting winter tires, it is always best to put them on all four wheels. If you are only getting two, have them put on the rear – even if you have a front-wheel drive or four-wheel drive vehicle.

This is a very important safety measure recommended by tire manufacturers. Sliding or fish-tailing on ice and snow is a matter of not having enough traction at the rear end. That is why your newest tires should always be on the rear.

Fuel Saving Tip: Tire Pressure Saves Fuel In Woodstock



Under-inflated tires waste gas for lots of folks in the Woodstock area. Think how hard it is to walk in sand – you just have to work harder because of the resistance. When your tires don’t have enough air in them, their rolling resistance is dramatically increased and it simply takes more gas to get from Marietta to Woodstock.

Marietta Tire Pressure Always check your tire pressure when you gas up at one of our local Woodstock service stations. If they’re low – even just a little bit – bring them up to proper pressure. There’s a sticker on the inside of your driver’s door that gives the manufacturer’s recommended tire pressure.

And don’t rely on your tire pressure monitoring system to alert you to when you need more air. The TPMS system is set to warn you when pressure drops twenty percent below recommendations. That’s severely under inflated and you needed more air a long time ago. And if you have a slow leak – get it fixed right away at Aero Automotive.

Get some air and save some gas.

Nitrogen Fill For Tires in Marietta GEORGIA

So, everyone in the Marietta GEORGIA area knows how great helium is – you know, party balloons, squeaky voices. But a lot of people around Marietta still haven’t heard about the benefits of nitrogen in your tires, and how it can help your tires. Here’s some great advice from AutoNetTV, brought to you by Aero Automotive. Nitrogen has actually been around for a long time in the Marietta GEORGIA commercial sector, but it’s just starting to catch on for private vehicles in the 30066 zip code area. Why nitrogen in your tires? Air is air, right? Actually, it turns out there is a difference.
Contact Aero Automotive to learn more about nitrogen in your tires You can find us at: 4725 Canton Rd. Marietta, GEORGIA 30066 Or call us at 770-926-9050
The heart of the matter is maintaining proper tire inflation. When your tires are properly inflated, they last longer, handle better and more safely, and save you money at the gas pump. The problem is that tires filled in Marietta with regular air can lose a pound and a half of air pressure every month. This just happens as the oxygen in the tire seeps out. So if you don’t check your pressure for a month or two, well, you can be significantly low – low enough to actually affect your handling, shorten tire life and waste money at the fuel pump. How does nitrogen help? Regular air contains about 78% nitrogen. Nitrogen is the largest molecule in air. It’s dry and non-flammable. Air also contains 21% oxygen, which is smaller and seeps out of the tire three to four times faster than nitrogen. So, a tire filled with nitrogen at Aero Automotive will take about six months to lose as much pressure as regular air does in just one month. So it’s more forgiving for those who don’t check their pressure every week. Also, when oxygen is at higher temperatures – like those inside your tire when you’ve been driving for awhile – it oxidizes the inside of your tire. Getting the oxygen out of your tire means that it’ll last longer. Who’s using nitrogen? Well, let’s start with NASCAR and Indy. These racers like nitrogen’s ability to maintain consistent tire pressure and reduce tire temperatures under very demanding conditions. The US government requires all commercial aircraft to have nitrogen in their tires. NASA and the US Military use nitrogen. The mining industry has been filling those “humongous” tires with nitrogen for years. And semi trucks and trailers are starting to use nitrogen extensively. You may have heard some detractors of nitrogen. But the studies and white papers from tire and vehicle manufacturers demonstrate that the technology really works. In fact, a prominent consumer research group did a study where they filled some tires with air and some with nitrogen and stacked them outside for a year. They observed that the nitrogen filled tires did hold their pressure better, but they couldn’t see the economic benefit. But that particular test has very little to do with the real world. Most tires are actually holding up cars and they also get driven around and do a lot of work. So if nitrogen helps them last longer, saves gas and gives safer handling, it’s worth considering. Learn more about nitrogen in your tires by watching our attached auto tips video from AutoNetTV.

Tire Replacement: What Marietta Drivers Need to Know

Looking at getting some new tires? The choices at Marietta tire stores can be a little overwhelming. Suppose you have an SUV and are trying to decide between all season tires or some that are also rated for off-highway. Do you get off the payment on the outskirts of Marietta more than most? If so, some additional off-road traction would be nice. Tire Replacement: What Marietta Drivers Need to KnowMaybe the real reason for wanting those off-highway tires is that they look cool. Well there’s nothing wrong with that. If you make sure that you’ve got your functional needs covered with your selection, then you can have some fun with where you go from there. Let’s suppose you zip around Marietta in a sporty car. You may like to run a high-performance summer tire when the weather’s good. When GEORGIA weather turns cold, you can put on high-performance winter tires. For the kind of driving you like to do, you want full-on performance tires. All-season tires are naturally a compromise that works well for most Marietta drivers, but since you have a choice, go for dedicated summer and winter tires. When it’s time for new tires, visit with a knowledgeable Aero Automotive tire professional. Describe your needs and wants. He’ll come up with some selections for you to discuss. And once you settle on a type of tire, there are options for special needs: like pulling a trailer or carrying heavy loads. Tires are one of the biggest purchases for Marietta drivers. With so many choices, you’ll be able to get what’s best for you. Take their time. And don’t worry about what’s in stock. If you want something that isn’t here at Aero Automotive, manager Scott Holton can order it. Chances are you’ll be rolling on your new tires in a couple of days.

Upsizing Wheels and Tires With Aero Automotive

At AutoNetTV we love doughnuts. So let’s pretend you have three doughnuts right in front of your for our discussion of upsizing wheels and tires. Hey, don’t eat them now – your going to need them later. Many people want to accessorize their car – you know, make it theirs. One of the easiest ways to get a custom look is to get some new wheels. There are thousands of wheel designs out there to get you the look you want. And for many, that look includes bigger wheels. It used to be that cars came from the factory with 15 or 16 inch wheels. Now 16, 17 and even 18 inchers are standard. And the factories are offering optional wheel packages up to 20 inches or more.
Come in to Aero Automotive to learn more about how you might upsize your wheels or tires. You’ll find us at 4725 Canton Rd. in Marietta, GEORGIA 30066.
So let’s talk about what to consider when you want to upsize your wheels. It’s not exactly a do it yourself project, so you need to know a thing or two before you get started. The most important term to know is rolling diameter. The rolling diameter is simply the overall height of your tire. Unless you want to modify your suspension, you’ll want to keep your rolling diameter the same when you upsize your wheels. Let’s think about those three golden doughnuts in front of you. They’re all about the same size. So if we pretend they’re tires, they would have the same rolling diameter. The doughnut hole is the size of the wheel. Now pretend we’ve made the hole bigger on some. That’s like having a bigger wheel – but the rolling diameter is the same. It’s important to keep the rolling diameter the same for several reasons. First of all, if the tire is bigger, it might not fit in the wheel well. Next the speedometer, odometer and anti-lock brake system are all calibrated for the factory rolling diameter. In order for your anti-lock brakes to work properly, the rolling diameter must stay within 3% of the factory recommendation. If you ignore that, you run the risk that your anti-lock brakes won’t work properly. Some cars today have electronically controlled suspension that will be negatively affected by changing the rolling diameter. Let’s think about the doughnuts again. You see, as the size of the wheel gets bigger, the sidewall gets shorter. The tire holds less air, so the sidewalls are made stiffer to compensate. Low profile tires from top manufacturers use special compounds that give the sidewall the strength it needs without compromising ride quality. As you increase your wheel size, you’ll typically get a slightly wider tire. This means that you have a larger contact patch. The contact patch is part of the tire that contacts the road. Because there’s more rubber on the road, the vehicle will handle better. And braking distances will be shorter. A lot of people with trucks or SUV’s love the extra control. You do have to watch out that the contact patch isn’t so big that the tires rub in turns or over bumps. What we’re talking about here is fitment. Your tire professional at Aero Automotive can help you get this right. He’ll install your new wheels, add spacers if needed to make sure your brakes fit inside your new wheels, and get you rolling. Also, if you drive off-road a lot, you may need a higher profile tire to protect your new rims. And make sure your new tires have the load rating you need if you tow a trailer or haul heavy loads. Again, your tire professional at Aero Automotive knows how to help. And don’t forget about tire pressure. If you have larger rims, your new tires will hold less air and they’ll need to run a slightly higher pressure. Forget that and you’ll wear your tires out fast. Finally, get an alignment after you get your new shoes. AutoNetTV wants you to safely have the look you want.

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