To me that BS seems a little short for the rear, maybe for the front on a stock clip. I'm putting 18x10 on my car 68 camaro and I have a 6.125" for BS. And your well numbers are bigger then what I have. The factors for BS are well size and rear end width. Hope this helps.
Define fit. The short answer to your question, providing your car is basically stock, is that these wheels will fit on the rear of your car providing you raise the rear up extra high to clear the tires so they never rub on the quarters (like we did in the 70s). The results will be they will extend out from under the quarter panel and look kind of funky (in my opinion).
What year model of Camaro? Is your rear end the standard length? Has your car been tubbed? These questions need to be answered to best advise your best fit.
302DZ, M22W Muncie, GV overdrive,12-Bolt Rear 3.73
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The rears have been mini-tubed and I have the following rear axle. I am going with a 295 vice a 12 inch wheel and 335's however I have the clearance for that.
By fit I am looking for a large lip on the wheel and an even tuck under the inner fender.
Fab 9 G Link Ready Bolt In rear housing, Backbraced, Narrow
to 50" housing end to housing end, 55" Overall axle flange to
axle flange, Big Ford Torino Ends, Zero Pinion Offset, 31
spline axles for True Track differential, 5 X 4 3/4 pattern, 1/2 X
Doing the math you'll have 3.5" inside clearence between the inner fender and outer lip of the rim of the wheel. A 10" wheel is measured from the inner edge of the lip of the rim where the tire mounts meaning a 10" wheel is closer to 11" wide. Subtract the 3.5" from the 15" of space you have as shown in the drawing leaves you 11.5" so yes the wheel itself will clear the outer fender lip by 1/2".
Now mounting a 295/35 on a 10.5" wheel has an advertised 11.9" section width which doesn't include RWL or other writing in the sidewall and the tire will be pressing tight against the fender lip if tucked inside the fender. I understand 2/10" can be subtracted from the 11.9" section width because the rim is 10" not 10.5" but those measurments are taken without the load of the car on the tire and the result will be the same, the tire will be against the fender lip.
What's the aversion to backspacing? With your mini tub you have more than 3" of inner fender clearence if the shocks and springs are not in the way. Run a 5 or 5.5" back space had have lots of room all around...
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I am looking for the correct backspacing/offset to have my tire able to tuck into the inner lip of the outer rear fender. Additionally I wanted as deep of an offset on the wheel that I could have with it still looking correct. I have a 4 link rear end so I will be lowering the car and was concerned about the tire rubing.
So I am not averse to any backspacing I just dont know what I need. I am asking because it did not sound correct to me either. 5 - 5.5 seems more likely to me as well but I have never set up the rear end of a car.