18x10 and 18x11, what tires for daily?

[fackamato]

Here in WA it's a mix of 50% rain and 50% dry. I have dedicated track tires (NT01) so this would be for wet on the track, and daily everything else. The car is stock suspension wise.

Michelin Pilot Sport 4S
Front 275/35/18
Rear 285/35/18

Section Width on Measuring Rim Width
11.40" on 10.00"

Michelin Pilot Super Sport
Front 275/35/18
Rear 295/35/18

Section Width on Measuring Rim Width
11.80" on 10.50"

The section width is the same, if the rim size is the same, according to Michelin. So, with 295 in the rear I gain some, but then it's not a 4S tire.

What would you do? There's also the Continental Extremecontact Sport, I suppose. It had better stopping distance than MP4S, but was slightly worse on the track.

[CanAutM3]

You might wamt to look at what tread width the different tires offer. Section width is not directly related to how much rubber is on the road and how much grip a tire offers. Section width varies significantly with wheel width but tread width does not.

[ntg44]

The 18 inch ExtremeContactSport is awesome. I have them on my car, 265/40/18 front, 285/40/18 rear. Compared to the stock PSS, it's not even close.

On stock PSS, my traction control would always intervene, cut power, but then it would do this thing where it would start at 0% throttle, and very very gradually go back to full throttle, until TC intervened again. Below 55 degrees, forget it. The car wasn't even worth driving.

After switching to Continental ECS, above 70 degrees F there's no hiccups at all in the dry. But between 70 and 20 degrees (yes 20) in the dry, traction control intervenes so much less, and it's only on full throttle in 1st and 2nd. But when it does, it only stutters the power delivery for a tiny fraction of a second, and then power delivery resumes instantly after that. It doesn't do that weird throttle curve as with the stock PSS.

I say get tires with standard sizing for your car. Going down to a 35 sidewall will lower the car a bit and make your gearing a bit more aggressive, which may hurt your traction even more. Since you have track tires, the ECS is an awesome street tire for a huge range of temperatures. You're not getting your best lap times in the wet anyways, so may as well get a tire that is versatile. Your choice of course.

[fackamato]

Originally Posted by CanAutM3

You might wamt to look at what tread width the different tires offer. Section width is not directly related to how much rubber is on the road and how much grip a tire offers. Section width varies significantly with wheel width but tread width does not.

The 295 MPSS has a bit more tread width according to tire rack.

[fackamato]

Originally Posted by ntg44

The 18 inch ExtremeContactSport is awesome. I have them on my car, 265/40/18 front, 285/40/18 rear. Compared to the stock PSS, it's not even close.

On stock PSS, my traction control would always intervene, cut power, but then it would do this thing where it would start at 0% throttle, and very very gradually go back to full throttle, until TC intervened again. Below 55 degrees, forget it. The car wasn't even worth driving.

After switching to Continental ECS, above 70 degrees F there's no hiccups at all in the dry. But between 70 and 20 degrees (yes 20) in the dry, traction control intervenes so much less, and it's only on full throttle in 1st and 2nd. But when it does, it only stutters the power delivery for a tiny fraction of a second, and then power delivery resumes instantly after that. It doesn't do that weird throttle curve as with the stock PSS.

I say get tires with standard sizing for your car. Going down to a 35 sidewall will lower the car a bit and make your gearing a bit more aggressive, which may hurt your traction even more. Since you have track tires, the ECS is an awesome street tire for a huge range of temperatures. You're not getting your best lap times in the wet anyways, so may as well get a tire that is versatile. Your choice of course.

I didn't think about 40 profile. Do you have any pictures? Sounds like it'll be a boaty ride unless those side walls are super stiff?

[ntg44]

Originally Posted by fackamato

I didn't think about 40 profile. Do you have any pictures? Sounds like it'll be a boaty ride unless those side walls are super stiff?

Profile is the same as stock 18 inch tires. You can go to a 35 profile in the rear once you go to a 295. Not saying you can't do 35 all around, just that it isn't what the factory uses.


https://f80.bimmerpost.com/forums/sh...98&postcount=1

[fackamato]

Originally Posted by ntg44

Profile is the same as stock 18 inch tires. You can go to a 35 profile in the rear once you go to a 295. Not saying you can't do 35 all around, just that it isn't what the factory uses.


https://f80.bimmerpost.com/forums/sh...98&postcount=1

Ah, I wasn't aware. Thank you!