Scored some 17x9 American racing rims today, 40 backspacing, can someone help me figure out what size spacers I would need? Pics for reference,
Those look like front wheel drive/late model wheels with positive offset. If I had to hazard a guess?.. I'd think you'd need very large spacers well in the 2+ inch range to fit on these cars.
Probably not. The OP's best bet is to measure the true backspacing and shoot for about 4.5 inches max of negative. So, if that 40mm is a positive number?.. that's somewhere around 1.5 inches of positive meaning that it has approximately 7.5 inches of negative back spacing to contend with. Even if you could find a 3" spacer?.. the studs would be ridiculously long and the outside lip will likely rub the wheel-well too.
Realistically i just dont understand back spacing vs offset vs our cars, i asked what the backspacimg was and he said around forty, they came off a mustang.
mustang wheels seem to work with a 1.5" to 1.75" spacers. the 9" wide wheel will be tricky to fit into the front wheel well.
Check out Rons Rims (google his site). Guy is extremely nice and would find you a nice set of rims that will work with your car for a very pretty good deal.
. Backspace is measured from the back edge of the inside rim shell to the mounting pad of the wheel. Normally in inches. Offset is measured off the imaginary centerline of the wheel and as either a positive or negative number. Positive is having the mounting pad closer to the front of center Negative being closer to the rear. Normally in millimeters
What year Mustang were they on? If the backspace "is" 40 mm....that's less than 2 inches. Most newer Mustang wheels have almost a 6" backspace.
In my defense.. I was very tired when I rough math'd the numbers and tried to convey a in my previous post but I think that's about right, Dave. So, along those lines.. what Bryant said just about fits. I'm guessing he sure won't be lowering this car very much if he try's to squeeze these wheels into the already limited wheel wells.
Unsure. I got them so cheap i wont complain to much if i cant use them. I measured from the rear lip to the part that meets the hub and it was 6.5 inches, so that means 2 inch spacers would put them at 4.5 inches.... Which is what you guys said was the max. I also found a supplier for spacers from .25 to 3.0 and everything in between.
we have 9" wide wheels on the front of mo's car. they required the fender lip to be rolled and pushed out about an inch. also we had to trim the front valance to keep the tire from rubbing. the tire does tuck about 1" into the fender at ride height.
