Pin Drive Wheels

[jetsbaby]

I might just want to spend the money on custom wheels from Forgeline.. I currently have pin drive front lower control arms and pin drive upper and lower control arms for the IRS.. The wheels will be a bolt on wheel..What would be the correct back spacing and offset for my wheels..This would have to dead on accurate since I would be spending about 1K per wheel.. I will be keeping the same size tires 245/35R17 fronts and 315/30R17 rears..Thanks

[Jason Lavigne]

It's a little risky to take responsibility for guaranteeing the fit of your $4,000 set of wheels (esp. without seeing your car), so while I can't say I guarantee it, I'll share some helpful information in making the calculation: The difference between standard width and pin drive on the rear suspension is 2.5" per side, so if your 10.5" wheel with the 335 wide tire has a backspace of 6.875" and fits right now, you should be able to use another 10.5"' wide wheel with 2.5" shallower backspacing on the pin drive width rear (so 4.375" backspacing). Basically, you're shifting the wheel mounting surface inward by the same amount you moved the hub inward with the narrower suspension.

The same goes for the front wheels, where the difference to pin drive width is 1.625" narrower per side. Just subtract that from your current backspacing, and that should do it.

Hope that helps! (I want to see the wheels when you get them!)

Jason @ FFR

[rich grsc]

You have to allow for the pin-drive adapter as well.

[Jason Lavigne]

Good point - you need to consider the "mounting surface" as the surface of the adapter that bolts to the hub, rather than the surface of the wheel alone.

Jason