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backspace offset for 19-20" wheel combo for c5?

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Old Jan 13, 2012 | 10:13 PM
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From: Palm bay Fl
Default backspace offset for 19-20" wheel combo for c5?

Im selling my CCW 18" wheels to go with potentially a 19-20" staggered wheel, ive seen many of them in pictures. but after about 2 hrs of searching on the web i cannot find where to gather the correct backspace and offset for these to work. I want to run 275 front, and 305 -315 rear tires.

The wheel width is only important to mount this wide of tire i want, so I would assume a 9" front and 10-11 inch rear. Has anyone put 19-20" wheels on a c5 if so it would be great to know the offsets you used. and pictures are always a plus. Thanks.

Worse case I will go with 19" front and rear, but would like the staggered look
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Old Jan 14, 2012 | 12:28 AM
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m looking at these can someone tell me if they will fit

http://www.ebay.com/itm/19-20-Black-...ht_1419wt_1401
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Old Jan 14, 2012 | 09:10 AM
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Originally Posted by 8VETTE7
The rears are 12" wide. Without flared rear fenders they will stick out beyond the fenders by just under 2". More when you add on any tire buldge. If the car is lowered you cannot even mount them. Fronts would be close. Depends on whether the car is lowered or not. They may rub the inner fenders when the wheel is at full turn.

Here are the factory offsets for the C5. I suggest you use this info and the offset calculator (link below) to determine what will work on your car:

Backspace/offset dimensions are as follows:

C5 (coupe/vert):
Front 17x8.5", 58mm offset = 7.03" backspace
Rear 18x9.5" 65mm offset = 7.81" backspace

C5 Z06:
Front 17x9.5", 54mm offset = 7.38" backspace
Rear 18x10.5", 58mm offset = 8.03" backspace


http://www.1010tires.com/wheeloffsetcalculator.asp

What will fit is a combination of the wheel width and the wheel offset. The calculator takes both into account.

Thanks for that info man, i was sure the 12" wide wheel was to wide, and I dont really need it that wide but its all they offer in this type of wheel
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