I know this has been beat to death. I'm looking for the BS for 18"x11" wheel for a stock body 73. A 17"x11" would be 6.50" would the 18's be the same?
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Not necessarily. Hang around the next tech session when we run a few cars with giant rear tires up on lifts. The 17" and 18" rims are so much larger in dia than the OEMs that the primary interference in back- the lower cross-shaft with its nut on each end- is completely inside the rim. So the backspacing requirement to not hit there is probably quite different from 15 or 16s. If you buy from a hot-rod shop, be very sure you can return them if things don't work out. Mount the rim without a tire on the car first (mounting a tire usually negates any return). Of course, you can always call your favorite vendor who has already done all this mucking around for a perfect fit....
Backspacing will not change between same width wheels and tires. Just make sure that you check overall height of the new tire combination and keep it the same as the 17" also.
Bosswrench...
Thanks for the info, unforunately none of the vendors sell the Wheels I'm looking at.
Curt
Thanks for the info, unforunately none of the vendors sell the Wheels I'm looking at.
Curt
quote:Originally posted by Bosswrench:
Not necessarily. Hang around the next tech session when we run a few cars with giant rear tires up on lifts. The 17" and 18" rims are so much larger in dia than the OEMs that the primary interference in back- the lower cross-shaft with its nut on each end- is completely inside the rim. So the backspacing requirement to not hit there is probably quite different from 15 or 16s. If you buy from a hot-rod shop, be very sure you can return them if things don't work out. Mount the rim without a tire on the car first (mounting a tire usually negates any return). Of course, you can always call your favorite vendor who has already done all this mucking around for a perfect fit....
Curt,
For an equivalent width wheel you'll want to maintain the backspacing to get the wheel sitting correctly on the fender side. If you move the offset inward it'll look odd ('funny car' syndrome). 18" wheels are a good way to go and becoming the more popular route for tire availability, because 18" tires are available in lower profile 30 series they are actually slightly smaller overall diameter than a 35 series 17" tire.
Julian
For an equivalent width wheel you'll want to maintain the backspacing to get the wheel sitting correctly on the fender side. If you move the offset inward it'll look odd ('funny car' syndrome). 18" wheels are a good way to go and becoming the more popular route for tire availability, because 18" tires are available in lower profile 30 series they are actually slightly smaller overall diameter than a 35 series 17" tire.
Julian
Buying wheels from vendors that do not provide them uniquely for Panteras can be a slippery slope. If you have stock mufflers make sure the tire will clear the front outside edge of the muffler.
Mike
Mike