Will these with 315 BFG drag radial tires fit on the rear of my camaro with modification to the inner fender liner(hammer). Or will i need a spacer.

 

That's pretty much the same backspace as the 17x11 50mm ZR1 wheel (7.93"). Look at my writeup on 17x11 wheels in the FAQ stickied at the top of the page.

The 315/30-18 shows a 12.6" section width, and that's just a bit larger than the 315/35-17 section width (12.4"). BFG recommends a minimum wheel width of 11.0".

Combine the slightly less backspace with the slightly wider section width, and you will have exactly the same problems I had. But note - these cars are nt all exactly the same. I've seen people claim they bolted the 315 tire/7.93" BS wheel combo on a 4th Gen and did NOTHING to make them fit.

 

Fred is right, these cars are all different. I have the 315/30/18 BFG drag radials on my 18 x 10.5" 3 piece Dazz Motorsport MATIZ rim and did absolutely nothing to make them fit on my car. I actually lowered the car with the coilovers too 1 3/4 fingers at all four corners from the tire to the fender

 

Are those Z06 wheels on your T/A?

 

What's the offset on the 18 x 10.5" 3 piece Dazz Motorsport MATIZ wheels?

 

3 piece Dazz Motorsport MATIZ rim


Front rim:





Fred, I can't recall what the offset is right now. I will have to look it up..

 

Looks good. How do you like those BFG drag radials.

 

The only reason I ask about the offset is, that's what determines whether the wheel or tire will hit anything. I would guess from the way they sit close to the outer edge of the fenders that they are closer to a 50mm offset. That eliminates the problems of the tire rubbing on the inside fender liner, and eliminates the wheel catching on the jounce bumper bracket when you jack the car and the axle drops.

 

Fred, I know remember the offset to be 48mm I believe ? I think the front is 42.5mm ? Remembering back to when I had DAZZ custom build the rims, they actually figured everything to spec for my WS6.

 

Firebirds have more room than the Camaros do back there, so you wouldn't get the same problems with the same backspacing.

 

Why would they be different? Both cars use the exact same rear axle assembly, inner fender liners and suspension. The Firebird fenders appear to be slightly more "bulged" than the Camaro fenders, which affects how much the wheel sticks out from under the fender. But with the inner parts made out of the same pieces, I'm not sure how there could be a difference in the backspace requirements. I went as far as measuring the same wheels on my 94 Formula and a friends 97 SS and could find no differences in the interior pieces.