Technical Tips > Brakes, Suspensions, Steering, Wheels & Tyres

Please Help Question Re:- backspace

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mick:
Ive decided on 15's for sure now. There On Order.

Thanks Guys

vette2bshaw:
If it not to late I hope you took into acount caliper clearence ,The corvette 4spots exceed the stud face of your disc by about 10mm and if you buy rims that are too flat in side such as weld and some others ,you then have to use spacer with extended studs (not good for high torque engines and not truely leagle) or spend a lot on new disc and caliper modifications.

mick:
I spoke to someone who already has these wheel's and he assured me that at the above back spacing for the 15's anyway all is good. Thanks for asking but it would have been an expensive fix if they didnt fit right.

77CVT:
old thread

For an 8 inch rim you need a 4 -4 1/2 offset.  

With a 10 inch rim you are limited by the trailing arms and the handbrake bracket (which you can move to the top of the arm).  So the outside rim will move further to the outside of the car.

MADVET:
3 3/4" back space isn't a lot. You will have quite a bit of "dish". Hopefully your flairs should cover them.

BTW back space and offset are two different things;
 Back space is the distance between the mounting face and the outside edge of the inside rim.
 Offset is the distance between the mounting face and the centre line of the wheel;-)

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