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      09-16-2012, 09:36 AM   #1
BMdriver
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M Sport - difference in ride height

Can anybody please confirm that the ride height of a 320D M Sport on 18 inch wheels is exactly the same as that on 19 inch wheels?
The kerbside before my driveway has a steep pitch which could catch the front splitters on the car. I have checked that an M Sport on 19 inch wheels will go on (just) without causing damage, but I am opting for 18 inch wheels to keep costs down. I assume the smaller diamater alloy is compensated by 1 inch more rubber to keepthe ride height the same.

Can anyone confirm this is the case?

Thanks.
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      09-16-2012, 10:30 AM   #2
MaestroAl
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The 19" wheels are 1.25mm larger in radius so will sit that much higher

You're comparing 225/45 R18 with 225/40 R19
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      09-16-2012, 10:41 AM   #3
BMdriver
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Thanks, I think if it sits only 1.25mm lower on 18's than 19's it should be ok, I hope so anyway.
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      09-16-2012, 11:34 AM   #4
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The height is exactly the same. The larger 19" wheels have lower profile tyres 40 section, the smaller wheels 18" have a larger side wall, 45 section which make the total diameter of wheel plus tyre the same!
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      09-16-2012, 01:30 PM   #5
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1.25mm is nothing. Think of ANY worn tyre vs brand new tyre - you are looking about 6-7mm difference so 1.25mm is negligible!
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