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.
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2020 F90 M5 Comp Oxford Green Metallic II-Aragon JOURNAL
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