Why Do BMW Have Wider Rear Tyres?

Additionally, a rear tire that is broader provides better acceleration traction.

Avoid rotating. Use the staggered layout indefinitely or purchase two “front” wheels to have a square setup. The larger wheels can likely be sold.

Rotate not. Use the staggered layout indefinitely or purchase two front wheels to have a square setup. The larger wheels can likely be sold.

Different brands make up the present run flats. bought the vehicle in that condition. Pirelli makes the front tires, but I can’t recall what the rear tires are. Particularly the Pirelli, they are essentially brand-new. I’ll either get rear Pirelli run-flat tires or simply swap out all of them for the same size. Run-flat tires and bumpy rides bother me. I enjoy Michelin. IMO, the best tires. Though there may be a better tire brand, they degrade more quickly.

Although Continental tires are also nice, I choose Michelin for my summer and winter tires.

To obtain the wheel dimensions, you must take off both the front and back wheels. In terms of the advice given in the previous piece, I concur.

I once had an M3. It had Michelins attached. When it came time to replace them, I wanted to save money, but I learned BMW also used Continentals, so I bought those instead. A mistake was made. My M3 changed into a totally new vehicle. I still regret making that choice. The one drawback of Michelin is that their soft tires tend to wear out more quickly. Softness contributes to comfortable riding and good handling.

Your rear wheels have a slightly different offset and are at least half an inch wider than your front wheels. They might rotate poorly as a result of this. With chowser51, I concur. Replace the rear wheels with two front wheels that are the same size as your current front wheels. Agree that selling your wider rear wheels shouldn’t be a problem either given there are always people want to upgrade to a staggered arrangement. If not, maintain what you already have and purchase tires that match your wheels.

It is extremely easy. Narrower tires up front for quicker steering and less resistance, broader tires in the back for greater traction during acceleration (narrower for less friction).

Why some automakers use larger tires on the back

Going back to the original query, we think you can now determine the solution for yourself. Naturally, the Smart Fortwo and BMW i3 do not depend on the enhanced sporting performance provided by the bigger rear wheels. Both vehicles are heavy-duty (engines are there), and the bigger wheels increase stability.

In the case of vehicles with obvious sporty performance, the manufacturer wishes to provide stronger traction and faster sprints in addition to superior cornering stability. Even if doing so necessitates replacing the most expensive tires in the car’s setup more frequently. However, in winter circumstances, the configurations with wide tires on the back offer no grip advantage. In this situation, the set of winter wheels must have matching tires.

However, if same width for the front axle and wheels ensures the best traction and grip, why don’t manufacturers choose this option? Wide tires are substantially more expensive, which is one factor. Another factor is the balance of the vehicle; as I mentioned, a vehicle with a predominately oversteer tendency will benefit from the narrower front wheels. Thirdly, the turning radius would be an issue. A tire that is too wide would make it difficult for the wheels to fully turn or would complicate the suspension’s design.

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1) There are many more variables beyond tire width that can increase or lessen understeer. You are better than that, I know that. By adjusting tire pressures at the track, it is simple to counteract the impacts of a 10mm tire width differential on handling balance.

2) BMW advises against rotating the tires.

The advantages of wider tires at the back include improved aesthetics and higher traction for acceleration in a straight line.

Why do BMW tires come in different sizes?

The configuration is referred to as staggered. It focuses on performance and car handling. The tires will stretch if you select 225 for the rears, which will affect your speedometer. The configuration is referred to as staggered.

The wider rear tires: why?

A wider tire strategy can be applied in two different ways. The first step is to install the same-size tires at each of your car’s four corners, and to select a section width that works well with your front and rear suspension components and bodywork. For rear-wheel drive cars, this is known as a “square” layout as it balances the contact patch between handling and acceleration. It is also unavoidable for all-wheel drive cars, which need the same tire diameter (which depends on section width) at every corner to prevent differential damage.

Additionally, you might have noticed that some enthusiasts decide to install a considerably wider tire on the back axles than they do the front. The idea behind this is to provide as much rubber as possible to transmit power to the tarmac, guaranteeing good grip for rear-wheel drive vehicles with higher horsepower. Anyone using drag radials or a tire with a wrinkle sidewall, which is unnecessary up front, is more likely to experience it.

This method has a few limitations. You won’t be able to rotate your tires properly, which can result in more wear, particularly if you frequently visit race tracks. Make sure that your suspension is aligned and dialed-in to minimize understeer if at all feasible because a wider tire at the back can affect how your car handles depending on how your suspension is set up.

Reverse-staggered cars, which have wider tires up front, are extremely uncommon when they leave the factory but are utilized on a very small number of vehicles. Nevertheless, this configuration can be found in select front-wheel drive track, autocross, and drag vehicles. These cars are nearly usually installed by a chassis builder or tuner who is fully aware of the effects it will have on performance.

Can my BMW have wider tires?

When making tight turns or when the suspension bottoms out, the tires may rub against the fender well if the new wheels and tires are larger than the stock ones. Speedometer readings can be erroneous because they measure speed by measuring the distance covered with each wheel rotation. Both the factory diameter and breadth of the wheels and tires must be preserved in order to keep the suspension and speedometer operating properly.

On the original rim, it is generally safe to install a tire that is up to 20 millimeters wider than stock. Depending on the rim’s width, the tire’s actual width will change: For every half inch (12.5 millimeters) increase in rim width, the tire will enlarge by 5 millimeters.

Because tire sizes are a combination of metric and percentage measurements while wheel sizes are in Imperial measurements, switching to a different rim becomes a little more challenging.

For instance, the car’s current tires are 225/45R15. This is what it indicates:

  • Tire width in millimeters is 225.
  • Sidewall height expressed as a percentage of tire width is 45.
  • Rim diameter in inches, 15.

Multiply the wheel size by 25.4 to get the millimeter equivalent:

1.5 times 25.4 equals 381 millimeters.

Next, multiply the tire width by the height percentage to determine the sidewall height:

101.25 millimeters is equal to 225 millimeters times 0.45.

To determine the combined height of the wheel and tire, add the two figures together:

482.25 millimeters (381-201 = 381.25)

The new tire and wheel should be within 3% of the height of the original combination in order to maintain speedometer accuracy. A tire with a height of 75.85 millimeters, or 34 percent of the 220 millimeter width, or 220/34R16, would be needed to move to a 16 inch (406.4 millimeter) rim. The closest size produced, 220/30R16, is well within the size tolerance of 3%.

Why are car’s back wheels wider?

Your ability to accelerate is increased by having a rear wheel with a wider diameter because it increases the quantity of rubber that meets the road along the vehicle’s axis. A large portion of your vehicle’s weight transfers to the rear when you speed. The front wheels, on the other hand, don’t require as much of a contact patch to handle steering and braking.

All OK, but what about vehicles without rear-wheel drive? After all, like the majority of supercars in its class, the Aventador S is truly an all-wheel-drive vehicle. Does it offer the same advantages? We’ll go into in more detail below.

Why are the tires on expensive vehicles wider?

There is a reason why broad tires are more common on automobiles than narrow ones. Overall, bigger tires are better for high-performance vehicles on dry surfaces. A larger surface area improves daily traction and durability.

Can I use regular tires on my BMW?

More and more brand-new BMW cars leave the factory with run-flat tires installed. Others prefer conventional tires, despite the fact that many owners appreciate the piece of mind that comes with tires that can extend your driving distance by 50 to 100 miles when flat. So, if a BMW arrived with run-flat tires, can it be used with ordinary tires?

You can use ordinary tires on your run-flat equipped BMW, if you’re searching for a quick and simple solution to that query. Both standard tires and run-flat tires have advantages and disadvantages, and we want to assist you in making the choice that best meets your requirements. One word of caution, though: due to the handling and performance variations between the two tire types, if you’re thinking about switching the run-flat tires on your BMW to standard tires, you must do so on all four of them.

Why should a BMW move from run-flat tires to conventional tires? New BMWs no longer come with spare tires in order to minimize overall weight. Some models come with BMW Mobility Kits in place of spare tires, particularly in performance-oriented M vehicles. The majority of other models have run-flat tires. These tires, also referred to as zero-pressure tires, give you the peace of mind that, even on a long-distance road trip, nothing other than a complete tire failure would keep you from reaching your destination or a repair facility. Run-flat tires have have advantages and disadvantages, though.

Rear wheels are wider than front wheels; why?

Ahbengdriver. It is designed for RWD vehicles since doing so allows the driver to benefit from torque and acceleration without risking wheel spin. Wider wheels have more rubber in contact, utilizing power that might otherwise be wasted.

Do rear tires that are broader provide more traction?

Both varieties have advantages in terms of safety: Wider tires have better traction than narrow ones on a dry road, but they also increase the risk of aquaplaning. Narrow tires perform better in harsh winter weather because they exert more surface pressure on the road.

Should the rear tires be wider than the front ones?

Many cars, but mostly rear-wheel-drive sports cars, have front tires that are narrower than back ones. Few automobiles had wheels with such a pronounced disparity in diameters as the 1978 Lamborghini Countach, which had massive 345/35R15 on the back and 205/50R15 up front. Additionally, this implied that the overall diameter of the front and back wheels might have varied by an additional 17mm (35% of 345 vs. 50% of 205). Since the sidewall aspect is rounded to the nearest 5, the actual diameter is unknown.

Traction and “look” are the reasons for broad rear wheels. Wider rear tires can provide better traction because a rear-wheel-drive car’s high power quickly causes wheelspin. Wide tires, on the other hand, tend to follow ridges and grooves in the road more readily (a process known as “tramlining”), require more steering effort, produce more rolling resistance (effort needed to start and maintain turning), and make it more challenging to achieve good suspension performance because they are heavier. Wider tires on the front wheels require larger wheel wells to accommodate turning, and after a certain width, additional traction is little.

While fitting narrower tires on the front and wider ones on the back is OK, fitting wider tires to only one side of the car is unnecessary. This would alter the vehicle’s weight distribution and cause one side to brake differently than the other. The dynamics of cornering would also change.