I took my rear 17"x9.5" rims 5 1/2 BS with 275/40/17 and bolted them on the front of my 71 GTO and at full turn there would only be enough space to slide a piece of paper between rim and upper Hotchkis A-Arm. Didn't detect any scrub but I didn't drive the car this way as I didn't want to damage the torque thrusts rims. The rims I want to put on are 17"x9" rims with 5" BS. Here is what I'm thinking and I'm asking because I'm no expert. The difference between the two rims is 1/2" and the difference in BS is 1/2". I'm thinking that difference with the new wheel will be 3/4 of an inch clearance on the backside to the upper A-Arm? Is my math correct. I did bolt the new rim on without Tire as I can't return to year one if I have a tire mounted and it did not hit, but is close to upper a-arm. I sent a email to tech support at Year One, and this is the reponse I received which I really didn't find very encouraging.
Hello
Thank you for purchasing from Year One.
The rear wheels you test fit on the front have 1/2 inch more backspace than the wheels with 5 inch backspace, so this doesn’t really tell you anything useful.
These wheels work on most stock cars which do not have chassis, suspension or sheet metal issues. When fitted with BFG G Force TA KDW tires most cars only scrub the tires at the extremes (again without the above issues). Note that some other models tires designated 275-40-17 are actually taller and/or wider than the KDW’s and will scrub more.
Since you have different spindles and aftermarket control arms we recommend you set a wheel in place on the car prior to mounting tires and installing lug nuts to check the fit.
Regards,
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