wheel backspacing Help!
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Joined: Dec 2015
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wheel backspacing Help!
Hey yall, need some help with wheels if anyone has any experience with backspacing that would help a ton. picked up a 93 250 and putting new tires on it. on the truck currently, there is a set of 33x12.5r16.5s (and no rubbing). I've always just kept the wheels that were on it before but with the 16.5s that isn't an option. wanting to run the same size tire on a 15 inch wheel. I've looked at a set of cragars 15inch x 10 inches on an 8x6.5. 6.50 bolt circle 4.125 backspacing. Does anyone know if I get these wheels and put a set of 33x12.5s on them would there be any rubbing? I know almost nothing about backspacing and I'm concerned that they'll either rub at full lock or on the caliper when trying to get them on. The same wheels come in a 15x8 inch and Id rather get those than have to buy a spacer after the fact. Thanks for the help!
https://www.summitracing.com/parts/c...5180/overview/
https://www.summitracing.com/parts/c...5180/overview/
FTE Legend
Joined: Jun 2006
Posts: 31,930
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From: Ottawa, Ontario
You can't put 15" wheels on an F250.. won't clear the front brake calipers, so you need 16" wheel minimum. Stock backspacing is no more than 1/2 the wheel width so you need a wheel with no more than 4" backspacing and preferably less than that.. around 3.5", because the larger the tire diameter the closer it gets to the leaf springs at full lock.
New User
Joined: Feb 2019
Posts: 9
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From: Los Angeles, Calif.
You can't put 15" wheels on an F250.. won't clear the front brake calipers, so you need 16" wheel minimum. Stock backspacing is no more than 1/2 the wheel width so you need a wheel with no more than 4" backspacing and preferably less than that.. around 3.5", because the larger the tire diameter the closer it gets to the leaf springs at full lock.
I run 16x10 with 305/70x16 (metric which converts to 33x12x16), no lift. I think that's pretty much the biggest you can go without spacer or lift. The 16 wheels are barely clearing the calipers, no room for the counterweights inside.
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corey fletcher
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Oct 15, 2010 05:32 PM
