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      08-16-2017, 02:21 PM   #1
Nbarrett
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20" wheel options for 356m f32 xdrive

I have a 2014 435 xdrive I just bought 356m wheels w the following tires installed.
245/35-20 fronts
275/30-20 rears
I think the rolling diameter is 26.75" if I calculated correctly

What I'm wondering is if these are alright to run or not. I don't want to damage any drivetrain components if that's the case. And if I need to run different tires any recommendations would help.

Tirerack was recommending 225/35-20 front and 255/30-20 rear
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      08-16-2017, 10:23 PM   #2
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Quote:
Originally Posted by Nbarrett View Post
I have a 2014 435 xdrive I just bought 356m wheels w the following tires installed.
245/35-20 fronts
275/30-20 rears
I think the rolling diameter is 26.75" if I calculated correctly

What I'm wondering is if these are alright to run or not. I don't want to damage any drivetrain components if that's the case. And if I need to run different tires any recommendations would help.

Tirerack was recommending 225/35-20 front and 255/30-20 rear
How many threads are you going to ask the same question in?
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      08-16-2017, 10:42 PM   #3
Nbarrett
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Quote:
Originally Posted by GCinFLA View Post
Quote:
Originally Posted by Nbarrett View Post
I have a 2014 435 xdrive I just bought 356m wheels w the following tires installed.
245/35-20 fronts
275/30-20 rears
I think the rolling diameter is 26.75" if I calculated correctly

What I'm wondering is if these are alright to run or not. I don't want to damage any drivetrain components if that's the case. And if I need to run different tires any recommendations would help.

Tirerack was recommending 225/35-20 front and 255/30-20 rear
How many threads are you going to ask the same question in?
Well see originally I asked about 437m and now I bought 356m. But I've asked around in a few threads. What's it to ya? I'm trying to get an answer without ruining my car beforehand. So I'll just keep firing Away.
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      08-17-2017, 07:05 AM   #4
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Quote:
Originally Posted by Nbarrett View Post
Well see originally I asked about 437m and now I bought 356m. But I've asked around in a few threads. What's it to ya? I'm trying to get an answer without ruining my car beforehand. So I'll just keep firing Away.
The style of wheel wouldn't make a difference.
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      08-17-2017, 07:38 AM   #5
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Quote:
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Quote:
Originally Posted by Nbarrett View Post
Well see originally I asked about 437m and now I bought 356m. But I've asked around in a few threads. What's it to ya? I'm trying to get an answer without ruining my car beforehand. So I'll just keep firing Away.
The style of wheel wouldn't make a difference.
19" vs 20" wheels
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      08-17-2017, 08:26 AM   #6
Walt White Coupe
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What matters most is that the diameter of the front and rear tires are very close to the same.
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      08-17-2017, 08:29 AM   #7
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What matters most is that the diameter of the front and rear tires are very close to the same.
rolling tire diameters are 26.75" front 26.49" rear.
Is this safe or unsafe
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      08-17-2017, 09:38 AM   #8
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thats way off for a xdrive. you need to be less than 1% difference
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      08-17-2017, 10:08 AM   #9
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Quote:
Originally Posted by Nbarrett View Post
19" vs 20" wheels
I just saw you mention the style of wheel which wouldn't matter. The diameter (19" vs 20") changes the tire size anyway, and regardless, you should be within 1% of the overall diameter of the factory setup. Seems you already know how to calculate this so you can size the tires accordingly.
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Last edited by skw; 08-17-2017 at 11:55 AM.
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      08-17-2017, 10:18 AM   #10
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Quote:
Originally Posted by skw View Post
Quote:
Originally Posted by Nbarrett View Post
19" vs 20" wheels
I just saw you mention the style of wheel which wouldn't matter. The diameter (19" vs 20") changes anyway, and regardless, you should be within 1% of the overall diameter of the factory setup. Seems you already know how to calculate this so you can size the tires accordingly.
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Originally Posted by wdeerfield View Post
thats way off for a xdrive. you need to be less than 1% difference
I just did the final math again. Not sure what I did this morning. 26.75" front and 26.49" rear.
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      08-18-2017, 09:18 AM   #11
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Those tires are pretty tall for the f30 platform. more than likely better for the f10. nevertheless they fall under 1% difference.

you could hypothetically run a 235/35/20 up front putting it at 26.48f, 26.49r.
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      08-18-2017, 09:50 AM   #12
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Quote:
Originally Posted by wdeerfield View Post
Those tires are pretty tall for the f30 platform. more than likely better for the f10.

you could hypothetically run a 235/35/20 up front putting it at 26.48f, 26.49r.
Yes I just figured this out last night. Just trying to find a brand that i can match. I have bubbles on the front tires anyway so I'm going to swap them out asap.


235/35-20 front
275/30-20 rear
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