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      09-03-2020, 02:09 PM   #45
anielsen71
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Ive been running staggered 225 front and 255 rear as vintersetup. Tires are Continental 860TS.
I have had no issues with those in the vinterweather in Denmark and southern Sweden. Not much snow here but a lot of black ice.

https://www.tyrereviews.co.uk/Tyre/C...act-TS-860.htm
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      02-10-2021, 07:33 AM   #46
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How to calculate the difference in % , and is the wheel size important or only the tyre size?

for example , i have a xdrive m240i , with default 7,5x18 and 8,x18 and 225/40 front and 245/35 rear.

if i buy new wheels 8x18 and 9x18 with the same tyre size (225/40 front and 245/35 rear) , is that good ?

thanks

Last edited by kriszty; 02-10-2021 at 08:27 AM..
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      02-10-2021, 10:51 AM   #47
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Quote:
Originally Posted by kriszty View Post
How to calculate the difference in % and is the wheel size important or only the tyre size?

i have a xdrive m240i, with default 7,5x18 and 8,x18 and 225/40 front and 245/35 rear.

if i buy new wheels 8x18 and 9x18 with the same tyre size (225/40 front and 245/35 rear), is that good?
only tyre size is important. to calculate difference in % go here...https://tiresize.com/comparison/

if you want to compare wheel diameter, width, offsets and tyres, go here...
https://www.willtheyfit.com/

225/40/18 & 245/35/18 is 1.2% difference from BMW

if your new wheels are 18x8 & 18x9, you can use your original tyres but i would use 225/40/18 & 255/35/18 OR 235/40/18 & 265/35/18 if their offsets permit.
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      02-10-2021, 12:04 PM   #48
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Quote:
Originally Posted by alohasurftoad View Post
only tyre size is important. to calculate difference in % go here...https://tiresize.com/comparison/

if you want to compare wheel diameter, width, offsets and tyres, go here...
https://www.willtheyfit.com/

225/40/18 & 245/35/18 is 1.2% difference from BMW

if your new wheels are 18x8 & 18x9, you can use your original tyres but i would use 225/40/18 & 255/35/18 OR 235/40/18 & 265/35/18 if their offsets permit.
thanks for explaning.. i drive xdrive so i think indead the 225/40/18 & 255/35/18 would fit the best ( -0,4% difference only )
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      02-12-2021, 09:24 PM   #49
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I'm new to the xdrive scene and wanted to do a staggered set up. I've read through the thread and used the calculators you guys posted and my numbers come up as -0.4. I'm assuming that is acceptable correct?
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      02-12-2021, 11:14 PM   #50
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Originally Posted by 2_N54's View Post
I'm new to the xdrive scene and wanted to do a staggered set up. I've read through the thread and used the calculators you guys posted and my numbers come up as -0.4. I'm assuming that is acceptable correct?
yes, it's acceptable for x-drive

since you're using taller than OEM tires, your front offset should be between +30-35 and rear between +40-45. this should mitigate any interference problems while turning full lock up front and during large compression for the rear.
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      05-05-2021, 04:49 PM   #51
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Bit of an old thread, but to add one more experience to the stack...

I started to quote multiple posts, but there are many of them, so I won't. But this is regarding which tires wear out faster, front vs. rear. My xDrive has a square setup with Pirelli Cinturato P7s.

On every car I've ever owned, the fronts wear out faster than the rears due to reasons explained earlier on this thread, scrubbing in turns. Even on strictly RWD vehicles, this has been the case.

For me, however, this car DOES wear out the rear tires faster than the front. I have no idea why, I don't get on my car hard from a stop or really even push it hard but once in a while. But, it does. Defies logic.
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      05-06-2021, 04:39 AM   #52
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Always goes out first the tires form drive axle
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      05-06-2021, 07:34 AM   #53
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Quote:
Originally Posted by turas View Post
Always goes out first the tires form drive axle
45 years of driving RWD cars that always wore out the front tires faster tells me otherwise. One might think that if the rears are providing all of the force when accelerating that they'd wear faster, but that's cancelled out by the fronts providing most of the stopping power. Where this doesn't apply is if you're doing silly stuff. like burnouts and drifting.



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      05-17-2021, 04:28 PM   #54
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Even with xdrive rear tires goes out first. Maybe the sides of front tires goes out first but not all surface.
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      06-05-2021, 05:38 AM   #55
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My boss, who also drives a BMW, just told me about this issue. His friend allegedly wrecked his xDrive because of different wear of his different sized wheels.
My BMW is from 12/2015. The winter wheels are all the same size, but the summer wheels are 225/40 R19 and 255/35 R19. Now, since all wheels are originally from BMW, I always thought, nothing can go wrong. Do I have to fear a big gear box damage in the future (with big bill), after what my boss said?
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      06-05-2021, 08:06 AM   #56
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Quote:
Originally Posted by Kriegsschatten View Post
My boss, who also drives a BMW, just told me about this issue. His friend allegedly wrecked his xDrive because of different wear of his different sized wheels.
My BMW is from 12/2015. The winter wheels are all the same size, but the summer wheels are 225/40 R19 and 255/35 R19. Now, since all wheels are originally from BMW, I always thought, nothing can go wrong. Do I have to fear a big gear box damage in the future (with big bill), after what my boss said?
225 40 and 255 35 r19 are standard BMW F30 xDrive staggered tires, so no worries on that setup
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      06-05-2021, 10:49 AM   #57
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Quote:
Originally Posted by RedSectorA View Post
Quote:
Originally Posted by Kriegsschatten View Post
My boss, who also drives a BMW, just told me about this issue. His friend allegedly wrecked his xDrive because of different wear of his different sized wheels.
My BMW is from 12/2015. The winter wheels are all the same size, but the summer wheels are 225/40 R19 and 255/35 R19. Now, since all wheels are originally from BMW, I always thought, nothing can go wrong. Do I have to fear a big gear box damage in the future (with big bill), after what my boss said?
225 40 and 225 35 r19 are standard BMW F30 xDrive staggered tires, so no worries on that setup
Yup, that in the UK, M Sport (and maybe other trims) came with factory staggered wheels, 225 front, 255 rear.
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      06-17-2021, 09:50 PM   #58
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If I'm running front 235/40/19 and rear 265/35/19 on my 2017 330i Xdrive, will this data fit for my Xdrive system?
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      06-18-2021, 08:10 AM   #59
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Quote:
Originally Posted by wt1370 View Post
If I'm running front 235/40/19 and rear 265/35/19 on my 2017 330i Xdrive, will this data fit for my Xdrive system?
Yep, it's within specs.
I'm running the same size on my F36
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      06-18-2021, 12:44 PM   #60
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Originally Posted by anielsen71 View Post
Yep, it's within specs.
I'm running the same size on my F36
Thanks for the info, buddy.
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      07-28-2021, 06:45 PM   #61
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Quote:
Originally Posted by ND40oz View Post
There's no possible way you could be off by 20%. That's like having a 30" circumference tire and a 24" circumference tire.

The stock 19" wheels using a 225/40/19 and 255/35/19 have rolling circumference of roughly 26" of which a one percent difference would put you at 25.74". Considering the tread depth of the Potenza S001 RFT is only 10/32 of a an inch or .31", you'd have to have a new tire and an almost bald one to have them more then .26" in circumference difference.
My m550i comes with 245/35/20 and 275/30/20 would I be able to run 255/30/20 and 295/30/20 with my new rims?
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      07-29-2021, 06:56 AM   #62
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Quote:
Originally Posted by Sreinhardt9 View Post
My m550i comes with 245/35/20 and 275/30/20 would I be able to run 255/30/20 and 295/30/20 with my new rims?
No, 255/35/20 + 295/30/20 would be perfectly fine for x-drive.
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