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The Tire Rack's Tire & Wheel Forum
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Old 07-17-2014, 07:43 PM   #1
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tire and spacer help

need some tire size help. I have a 03 m3 lowered, not slammed on sgt coilovers, rear fenders are rolled. I currently run PS2's in 275/30 in the rear on a 19x9.5 with a 10mm spacer without any kind of rub. I need to replace my tires now that they are worn. What I want to do is move the 10mm to the front, I have already tried it, and no ill effects to the front, but the replacement of the rear with a 18mm spacer I get problems. drives fine until I hit a bump

Now here is my questions.... with the 18mm spacer in the rear, and the 275 I get a little rub on the passenger side rear fender. On big bumps or dips in the road both rears hit the inside fender somewhere and it sounds awful, so I took the spacer out. Now that I need to replace my tires I was thinking if I went with a 265/30 that essentially gives me back 10mm of clearance to run the extra 8mm more of spacer, right? so that would give me 2mm more clearance then I have now. Is this correct?

Last edited by Mlust; 07-17-2014 at 07:46 PM.
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Old 07-22-2014, 07:00 PM   #2
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The 275 to 265 decrease in size does not necessarily equate to 10mm more clearance. 275s on 9.5 sit a bit differently than 265s on a 9.5. Not only do you have to consider the different tire size, but also brand/model and HOW the tire sits on the wheel (round vs square etc).

Without having to actually buy/mount the 265, these resources may be helpful:

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