Tyre sizes

carrera2RSL · 05-19-2017, 09:47 AM

Hmmm

I am looking at 305/30/20 rear on 11.5" rims and 275/35/20 on 10" rims front, but also wonder if 285/35/20 might be interesting on 10" rims up front. Kill understeer for good !?

HXS · 05-19-2017, 11:41 AM

That might induce oversteer. Also I wouldn't like the feel of that big of tire up front. Might add to the weight of steering.

It's also gonna look funky aesthetically. You'll be stretched out back and meaty up front.

m5 guy · 05-19-2017, 05:12 PM

Yeah if you do 285 up front drop down to a 30 sidewall to not upset the rolling diameter. On 20's you should be in luck and be able to find a 285/30 and 305/30 match. Will need a 10 inch front and 11 inch rear for that.

I had 285 on my 21's but went down to 265. I did not like the tramiline and the rolling diameter was off enough that at 1xx speeds it messed with the traction control. In a 21 size there are no 285/25's to match with the 305/25's so I went to a 265/30 for Michelin super sports. Pirelli had a 275/30/21, but I was not about to go Pirelli.

carrera2RSL · 05-20-2017, 12:27 AM

Unfortunatley the 285 at 30 profile is 7.25mm smaller and at 35 is 7mm bigger in radius. I think 305 and 275 makes sense as it's a 3mm height and diameter increase only

M6-Coupe · 05-21-2017, 11:49 PM

275 front and 305 rear is the best combination... I used to have it

05-19-2017, 09:47 AM	#1
carrera2RSL Lieutenant 183 Rep 579 Posts Drives: F10 M5 CP Join Date: Dec 2016 Location: UK iTrader: (0)	Tyre sizes Hmmm I am looking at 305/30/20 rear on 11.5" rims and 275/35/20 on 10" rims front, but also wonder if 285/35/20 might be interesting on 10" rims up front. Kill understeer for good !?
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05-19-2017, 11:41 AM	#2
HXS Licensed Drug Dealer 742 Rep 2,269 Posts Drives: F10 M5 Join Date: Oct 2010 Location: SoCal iTrader: (7)	That might induce oversteer. Also I wouldn't like the feel of that big of tire up front. Might add to the weight of steering. It's also gonna look funky aesthetically. You'll be stretched out back and meaty up front.
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05-19-2017, 05:12 PM	#3
m5 guy Brigadier General 1692 Rep 3,200 Posts Drives: 2020 M5 Comp Join Date: Apr 2012 Location: Hawaii iTrader: (14)	Yeah if you do 285 up front drop down to a 30 sidewall to not upset the rolling diameter. On 20's you should be in luck and be able to find a 285/30 and 305/30 match. Will need a 10 inch front and 11 inch rear for that. I had 285 on my 21's but went down to 265. I did not like the tramiline and the rolling diameter was off enough that at 1xx speeds it messed with the traction control. In a 21 size there are no 285/25's to match with the 305/25's so I went to a 265/30 for Michelin super sports. Pirelli had a 275/30/21, but I was not about to go Pirelli. __________________ 2020 F90 M5 Comp Oxford Green Metallic II-Aragon JOURNAL 2016 F10 M5 Space Gray-Black SOLD 2012 E70 X5M Monte Carlo Blue-Silverstone SOLD 2001 E46 M3 Oxford Green Metallic II-Cinnamon SOLD
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05-20-2017, 12:27 AM	#4
carrera2RSL Lieutenant 183 Rep 579 Posts Drives: F10 M5 CP Join Date: Dec 2016 Location: UK iTrader: (0)	Unfortunatley the 285 at 30 profile is 7.25mm smaller and at 35 is 7mm bigger in radius. I think 305 and 275 makes sense as it's a 3mm height and diameter increase only
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05-21-2017, 11:49 PM	#5
M6-Coupe Major General 1125 Rep 6,067 Posts Drives: F92 M8 Join Date: Feb 2014 Location: Bay area iTrader: (0)	275 front and 305 rear is the best combination... I used to have it __________________ Current : 2020 F92 Black Sapphire M8 - ZF8 Gone : 2018 F80 Mineral Gray M3 - 6MT Gone : 2016 F82 Austin Yellow M4 - 6MT Gone : 2013 F13 Sakhir Orange M6 -7DCT Gone: 2013 F13 Alpine White 650i -ZF8
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