wheel offset for GTO?
03-08-2006, 11:36 PM
#3
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That "should" fit but expect rubbing on the rear at the very least.
Stock offsets are 48mm and wider wheels will put one half of the extra width on each side of the wheels offset. (The offset is calculated from the wheel center, not from an edge. Backspacing is figured from the back of the wheel to the surface of the hub where the wheel mounts.) My backspacing is 7", the offset is 52mm on my rears which are 9" and tuck under the lip about 1/2". Their is roughly 3/4" room on the inner fender and control arm before the wheel or tire rubs anything.
The "ideal" backspacing for a 9.5" wheel would be roughly 56mm which would keep the tire under the lip (which still needs to be rolled or trimmed) and would allow for a little room on the inner fender still. A smaller offset will stick the wheel/tire out further which will increase rubbing on the lip area and doesnt look as good IMO. The difference bettween 45mm and 56mm is slightly less than half an inch which could make or break how much you have to trim off the fender lips.
Stock offsets are 48mm and wider wheels will put one half of the extra width on each side of the wheels offset. (The offset is calculated from the wheel center, not from an edge. Backspacing is figured from the back of the wheel to the surface of the hub where the wheel mounts.) My backspacing is 7", the offset is 52mm on my rears which are 9" and tuck under the lip about 1/2". Their is roughly 3/4" room on the inner fender and control arm before the wheel or tire rubs anything.
The "ideal" backspacing for a 9.5" wheel would be roughly 56mm which would keep the tire under the lip (which still needs to be rolled or trimmed) and would allow for a little room on the inner fender still. A smaller offset will stick the wheel/tire out further which will increase rubbing on the lip area and doesnt look as good IMO. The difference bettween 45mm and 56mm is slightly less than half an inch which could make or break how much you have to trim off the fender lips.
Last edited by CSiJason; 03-08-2006 at 11:42 PM.
03-16-2006, 11:32 AM
#6
Pontiac GTO Fitments
--------------------------------------------------------------------------
Bolt Pattern
5 x 120 mm
+48mm is the stock offset. (Same as most wheels for BMW's and many Audi and other euro cars.)
WIDTH ......... OFFSET ........... WIDTH OF TIRE
Front and Rear
7.0" ............ +26 to +65 ........ 215, 225, 235
7.5" ............ +33 to +61 ........ 215, 225, 235, 245
8.0" ............ +39 to +55 ........ 225, 235, 245
8.5" ............ +45 to +48 ........ 235, 245, 255
REAR Only!
8.0" ............ +36 to +65 ........ 245, 255
8.5" ............ +42 to+65 ......... 245, 255
9.0" ............ +48 to +65 ........ 255, 265, 275
9.5" ............ +55 to +64 ........ 265, 275,
OFFSETS GREATER THAN SHOWN ABOVE WILL RUB ON REAR
FENDER LIP. (25MM FENDER LIP)
From the Wheel and Tire Forum . . . .
--------------------------------------------------------------------------
Bolt Pattern
5 x 120 mm
+48mm is the stock offset. (Same as most wheels for BMW's and many Audi and other euro cars.)
WIDTH ......... OFFSET ........... WIDTH OF TIRE
Front and Rear
7.0" ............ +26 to +65 ........ 215, 225, 235
7.5" ............ +33 to +61 ........ 215, 225, 235, 245
8.0" ............ +39 to +55 ........ 225, 235, 245
8.5" ............ +45 to +48 ........ 235, 245, 255
REAR Only!
8.0" ............ +36 to +65 ........ 245, 255
8.5" ............ +42 to+65 ......... 245, 255
9.0" ............ +48 to +65 ........ 255, 265, 275
9.5" ............ +55 to +64 ........ 265, 275,
OFFSETS GREATER THAN SHOWN ABOVE WILL RUB ON REAR
FENDER LIP. (25MM FENDER LIP)
From the Wheel and Tire Forum . . . .
