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question about tires and wheels

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wilsowe

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I've got a hookup on some 33x12.50x15 procomp xterrains mounted on 15x10 steelies with 3.75 inch backspacing. Do ya'll think this will fit on a stock 1990 k5? Also, if the wheel are too wide or wrong backspace, what about the 33x12.50 on the stock 15x7 wheels, would that work? Thanks for any and all help.
 
wilsowe said:
I've got a hookup on some 33x12.50x15 procomp xterrains mounted on 15x10 steelies with 3.75 inch backspacing. Do ya'll think this will fit on a stock 1990 k5? Also, if the wheel are too wide or wrong backspace, what about the 33x12.50 on the stock 15x7 wheels, would that work? Thanks for any and all help.
Click to expand...

Yes and yes :D !
 
I don't know for sure if the backspacing will be OK, I'm thinking it should, but 33x12.50R15s on 15x7s doesn't seem like a good idea, too much tire and not enough rim...:thinking:
 
I run 12.50s on an 8 inch rim and have no problems I say go for it. What is 1/2" difference ya know:D . I plan on running 42X15X15 on these same 8" rims also maybe a 42X15X16.5 on H1s so I do not subscribe to the too much tire / too narrow rim crowd.

Ira
 
i run 33 x 12.50's on 15x10" rims with a 4 inch lift and recently noticed that i have bent the rear lip of the front fender. i have seen 32's on a stock blazer and that looks like as much as i would run with no lift and no trimming.

wide tires on a narrow rim will have more of a roll in the turns, kind of a 'flat tire' feel.
 
Back in my younger days (1998) I had a '75 Blazer and had 31x10.50R15s on the stock steel 15x6s and I noticed handling difference (a negative one). It wasn't a HUGE problem but I definitely noticed a difference. I upgraded to 15x8s as soon as I had the money to do so.

I'm just putting this together, 33x12.50R15s on 15x7s? He's gonna notice a diminishing effect on the handling. Some people don't mind that, though.

Just my 2 cents.
 
There is really no reason you should be able to notice any handling differences between something like a 7" and 8" rim assuming you have the same tire.

33x12.50s on a 15x10 rim will fit on most stock K5's, though they all differ a little because of spring sag, etc... However it will definitely be tight and would probably only be okay on the road. Any flexing off-road would likely cause the tires to hit the fenders. Put the same tires on the stock 15x7's and you would have more room. The wider rims will put the tires closer to the bottom edges of the fenders when you turn them.
 
Clod_King said:
what is the disadvantage of "too" narrow of a rim anyways??

(sorry for the hijack)
Click to expand...

It causes the tire to "balloon" and look like a ring bologna, which will wear out the center of the tread prematurely. On the plus side, it helps if you rock crawl because you can run seriously low tire pressures without rolling off the bead.

wilsowe: the wheel size and backspacing will fit fine. It may rub the fenders a bit when the tires stuff up but hey... that's why they invented lift kits, right? :D
 
ive got 15x10s and 33x12.5s and the scrub while flexing and turning/flexing, both on the front. ive run 30x11.5s on a 15x6 before. sideways buldged like heck but i wont worried about poppin a bead. hell it was a b*tch to get tires unmounted to sell them.
 
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