21" Tire size recommendation

Jaybutta3k · 08-22-2020, 06:34 AM

Hello guys. Fairly new member here. I'm seeking advice on proper tire width for 21" wheels. Which is better for the AWD transaxle: 275 front/285 rear or 275 front/295 rear? I will be taking delivery of my 2021 M5 Comp today and I would like to step up to 21" wheels and tires.

josec70 · 08-22-2020, 07:04 AM

Quote:

Originally Posted by Jaybutta3k

Hello guys. Fairly new member here. I'm seeking advice on proper tire width for 21" wheels. Which is better for the AWD transaxle: 275 front/285 rear or 275 front/295 rear? I will be taking delivery of my 2021 M5 Comp today and I would like to step up to 21" wheels and tires.

I'm on Michelin PS 4S

295/ 275- 30- ZR 21

I've had this set up for almost two years at this point with zero issues.

Here is a pic of the setup: PM if you have any questions.

Nikolov · 08-26-2020, 02:42 AM

I'm running 285 front and 295 rear. As long as the rear is bigger and the difference in diameter is ~1%, you should be good.

Jaybutta3k · 08-26-2020, 07:21 AM

Quote:

Originally Posted by Nikolov

I'm running 285 front and 295 rear. As long as the rear is bigger and the difference in diameter is ~1%, you should be good.

okay, thanks for the input

Jaybutta3k · 08-26-2020, 07:23 AM

Quote:

Originally Posted by josec70

Quote:

Originally Posted by Jaybutta3k

Hello guys. Fairly new member here. I'm seeking advice on proper tire width for 21" wheels. Which is better for the AWD transaxle: 275 front/285 rear or 275 front/295 rear? I will be taking delivery of my 2021 M5 Comp today and I would like to step up to 21" wheels and tires.

I'm on Michelin PS 4S

295/ 275- 30- ZR 21

I've had this set up for almost two years at this point with zero issues.

Here is a pic of the setup: PM if you have any questions.

Thanks for the info. Did you have to change any settings in the idrive for the new wheel configuration?

josec70 · 08-26-2020, 07:56 AM

Quote:

Originally Posted by Jaybutta3k

Quote:

Originally Posted by josec70

Quote:

Originally Posted by Jaybutta3k

Hello guys. Fairly new member here. I'm seeking advice on proper tire width for 21" wheels. Which is better for the AWD transaxle: 275 front/285 rear or 275 front/295 rear? I will be taking delivery of my 2021 M5 Comp today and I would like to step up to 21" wheels and tires.

I'm on Michelin PS 4S

295/ 275- 30- ZR 21

I've had this set up for almost two years at this point with zero issues.

Here is a pic of the setup: PM if you have any questions.

Thanks for the info. Did you have to change any settings in the idrive for the new wheel configuration?

I do not recall changing anything on the idrive.

PartsEvolved · 04-21-2021, 01:56 PM

Quote:

Originally Posted by Jaybutta3k

Thanks for the info. Did you have to change any settings in the idrive for the new wheel configuration?

RE: 275/35R20 & 285/35R20 vs. 275/30R21 & 295/30R21

Since there's no difference in overall diameter, which is the only thing that matters, there's no need to do anything special to the vehicle.

Source: I've been selling tires for over 20 years.

08-22-2020, 06:34 AM	#1
Jaybutta3k New Member 10 Rep 27 Posts Drives: 2022 BMW M8 comp Join Date: Dec 2019 Location: Atlanta GA iTrader: (0) Garage List 2022 BMW M8 comp [10.00]	21" Tire size recommendation Hello guys. Fairly new member here. I'm seeking advice on proper tire width for 21" wheels. Which is better for the AWD transaxle: 275 front/285 rear or 275 front/295 rear? I will be taking delivery of my 2021 M5 Comp today and I would like to step up to 21" wheels and tires.
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08-26-2020, 02:42 AM	#3
Nikolov Lieutenant 239 Rep 473 Posts Drives: '19 F90 M5C, '17 911 TTS Join Date: Aug 2015 Location: Sofia, Bulgaria iTrader: (0)	I'm running 285 front and 295 rear. As long as the rear is bigger and the difference in diameter is ~1%, you should be good. __________________ Snapper Rocks Blue on Tartufo leather \| All options except Homelink and tow hitch
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