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      11-14-2012, 05:37 AM   #5

M3SQRD's Avatar
Drives: E92 M3s, R56 Cooper S
Join Date: Jun 2009
Location: EC

Posts: 2,479
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The location of the lower spring mount/collar sits up higher on the RS1 (damper body isn't as short as some other aftermarket dampers). I had clearance issues with my old damper setup but I'd have no problem now running a 10"et25 with a 275 tire - I can measure my current gap with a 9.5et23 but it's significant!

kaiv - the delta backspacing between your 10.5et20 and a 10et25 is ~0.05", and between my 9.5et23 is ~0.38". There's ~0.5" of clearance but I can easily verify...