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:cheersI have a 66 gto with P235 60 R15's tires front and rear. The rims are cragar SS's, not sure what size they are (15X?) The set on the rear are wider than the front, actually too wide, they make the tires rub the inside of the wheel-wells and have ruined both side-walls. What is the widest rim size for my tires in the back with out rubbing?
 

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I have the exact tire size you have on the back of my 66 Lemans with no tire rub. The key is in the back spacing. I have a 5.5" back space on the rear. My next tires will be slightly wider.
 

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You could also trim the inside of the fender wells to gain the space you need. That's what I needed to do to get the 295/50/15s under the back of mine.
Also I have a friend with a machine shop who makes rings that go inside of the rims and perfectly center them on the hub to illuminate any vibrations from the uni-lug design, PM me if interested.
 
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