Wheel Width

iskysoma01 · 10-22-2021, 03:18 PM

If I go from 19x9.5 to 19x8.5 will the offset change and do I need to compensate?

corbs09 · 10-22-2021, 03:52 PM

Yes, and you shouldn't do that, part of the reason these cars turn in better than the previous gen is more tire up front. Most people are trying to fit MORE wheel under the front, not less.

iskysoma01 · 10-22-2021, 08:23 PM

Was thinking about it for a winter wheel and tire set up, narrower is better in snow

bmbob · 10-24-2021, 01:31 PM

Short answer is yes it would change however you just need to ensure the offset works on the vehicle. Use a wheel offset calculator (eg. www.1010tires.com/Tools/Wheel-Offset-Calculator) to check what offset is needed to match to OEM or change as desired.
Stock offset is ET20 front and rear so an 8.5 should be ET7 to match which I don't think is easy to find.
In my experience in running in snow/ice my entire driving life, just leave it alone, doesn't make as much as a difference as you think. Sure going from a 11" to an 8" would but 9.5 to 8.5 would be minimal.
I would prefer to enjoy the look of my M-car all year round, 8.5's would bug me.

10-22-2021, 03:18 PM	#1
iskysoma01 Private 83 Rep 55 Posts Drives: M3. G80 Join Date: Oct 2021 Location: Maine iTrader: (0)	Wheel Width If I go from 19x9.5 to 19x8.5 will the offset change and do I need to compensate?
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10-22-2021, 03:52 PM	#2
corbs09 Lieutenant 354 Rep 478 Posts Drives: 09 335i Join Date: Jul 2013 Location: Dallas iTrader: (1)	Yes, and you shouldn't do that, part of the reason these cars turn in better than the previous gen is more tire up front. Most people are trying to fit MORE wheel under the front, not less.
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10-22-2021, 08:23 PM	#3
iskysoma01 Private 83 Rep 55 Posts Drives: M3. G80 Join Date: Oct 2021 Location: Maine iTrader: (0)	Was thinking about it for a winter wheel and tire set up, narrower is better in snow
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10-24-2021, 01:31 PM	#4
bmbob Private First Class 268 Rep 197 Posts Drives: 18' C63S, 15' M4 Join Date: Jan 2012 Location: Calgary iTrader: (0) Garage List 2021 BMW M4 Competi ... [9.50] 2018 Mercedes C63S [8.00]	Short answer is yes it would change however you just need to ensure the offset works on the vehicle. Use a wheel offset calculator (eg. www.1010tires.com/Tools/Wheel-Offset-Calculator) to check what offset is needed to match to OEM or change as desired. Stock offset is ET20 front and rear so an 8.5 should be ET7 to match which I don't think is easy to find. In my experience in running in snow/ice my entire driving life, just leave it alone, doesn't make as much as a difference as you think. Sure going from a 11" to an 8" would but 9.5 to 8.5 would be minimal. I would prefer to enjoy the look of my M-car all year round, 8.5's would bug me.
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