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BMW M5 F90 (2018+) General Forums Wheels | Tires | Suspension | Brakes | Chassis    Rim sizes for 255/295s - handling; M question :)

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      02-21-2020, 08:57 AM   #1
luke1990
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Drives: G30 540ix
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Rim sizes for 255/295s - handling; M question :)

Hi guys,

I'm buying new forged rims and need and advice on size. I actually have 540ix G30, but there is a reason why I'm posting here - hear me out please. THANKS A TON!

I will go 19s (lighter, good for handling, we have bad roads ) and put 255/295 tires on it (+10mm front, +20mm back; already checked - overall size is good). I'm thinking 19/8,5 front and 19/10 back (ET not important for this discussion).

Question: For sporty driving/handling - is 8,5 enough for 255s and 10 for 295s? Or go 0,5 more on each? For handling/sporty driving. This smaller concave or this wider flat? I think 8,5/10 is enough and it will be a bit lighter, but (AND HERE IS WHY I ASK HERE ) - I've noticed M cars have rather flat vs concave (M4s with 255/275 on 9s/10s, F90 M5s - 275/285 on 9,5s/10,5s) and dont know why. Is flat setup better for handling??

Please save me! THANKS A TON!
Appreciate 0
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