38.5 on 15x8's? - Pirate4x4.Com : 4x4 and Off-Road Forum
 
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Old 01-03-2003, 01:30 PM   #1 (permalink)
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38.5 on 15x8's?

I have a set of 38.5" SX's that I need tires for. I have been looking at all the companies like US Wheel, American Racing, Weld, etc. and they don't seem to list any 15x8 8 lug rims. Who sells these rims for cheap that are 8 lugs.
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Old 01-03-2003, 01:33 PM   #2 (permalink)
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Re: 38.5 on 15x8's?

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Originally posted by attachcurrie
I have a set of 38.5" SX's that I need tires for. I have been looking at all the companies like US Wheel, American Racing, Weld, etc. and they don't seem to list any 15x8 8 lug rims. Who sells these rims for cheap that are 8 lugs.
Do you mean wheels?

Try Summit..they sell 4.25 and 2.75 bs I believe.
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Old 01-03-2003, 01:34 PM   #3 (permalink)
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www.summitracing.com

US Wheel Series 70's can be had for as little as 27.95, IIRC.
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Old 01-03-2003, 03:34 PM   #4 (permalink)
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Re: 38.5 on 15x8's?

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Originally posted by attachcurrie
I have a set of 38.5" SX's that I need tires for.
Can ya run 38.5s on 8 inch wheels? On the street? Without beadlocks?

I wanna know 'cause I'd rather have them than 38s. They are way undersized.

BTW, I picked up a set of 15x8 with 3.75" bs from Summit for 27.95 and free shipping last month.
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Old 01-03-2003, 04:02 PM   #5 (permalink)
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To my knowledge you can, it's my plans, and from reading 15x8 will hold a bead better.
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Old 01-03-2003, 04:04 PM   #6 (permalink)
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well, first off it doesn't matter on the height of the tire so much as the width. 14.5 wide SX's will be a little stiff on the 8" rims, you'd be better on 10". 12.5's would be perfect. Also if you are looking at 16.5" wheels, a bunch of folks (including myself) are going with recentered hummer beadlocks for aroun 170-190 a piece.

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Old 01-03-2003, 04:14 PM   #7 (permalink)
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Originally posted by SeanP
well, first off it doesn't matter on the height of the tire so much as the width. 14.5 wide SX's will be a little stiff on the 8" rims, SeanP
I'll be runnin' mud and on the road way more than rocks. Mild (by this forums standards) trails mostly. All we got around here is rocky mud or muddy rocks.

I doubt I'll need to air down much below 10 psi. I went with 8s instead of 10s because of the overall width and backspacing. Am I stuck with 38x12.5 TSLs?
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Old 01-03-2003, 04:24 PM   #8 (permalink)
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Yea the tires I have are 38.5x14.5x15. What would be the difference in running a 8 inch vs. 10 inch.
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Old 01-03-2003, 04:28 PM   #9 (permalink)
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8 inch will pull the beads in and stiffen the sidewalls. There are two trains of thought as to whether you lose beads easier on narrow rims vs wide. Your contact patch will be smaller on the 8" vs the 10inch

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Old 01-03-2003, 04:48 PM   #10 (permalink)
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What would have better on-road manners? No tow rig yet.
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Old 01-03-2003, 04:58 PM   #11 (permalink)
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better for on road? 37 MTRs on 15x8 rims. Seriously.

I would go for the wider rim and bigger contact patch for 14.50 SXs, grooved and siped.

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Old 01-03-2003, 05:17 PM   #12 (permalink)
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just remember the more you cut the tires up, and the skinnier wheel you run, the more the tread is going to crown out. I run 38.5x16's that are cut on 15x10's. the tread crowns up a LOT. I have to run them at 14psi on the street to get them to lay down right, just something to think about.

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