Truck 17" 8x6.5 on a trailer? - Pirate4x4.Com : 4x4 and Off-Road Forum
 
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Old 04-10-2019, 07:13 AM   #1 (permalink)
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Truck 17" 8x6.5 on a trailer?

I am thinking about running LT 245/75x17 on my car hauler. It has 7k axles. I'm aware that the load rating might not be quite as high as a trailer tire but I don't want to run separating dry rotting chi junk tires again. I'm not really here to have the LT vs ST tire debate.

245/75x17 are super common here in the barely used second hand market. They are quite close in size to 235/85x16. Guys take them off newer 2500 3500 trucks to run nicer/bigger. I can get some with only a few thousand km on them for $40 each right now.

I grabbed a set of dodge wheels yesterday just to try on. They had 265/70 rubber on them but with 6.2" of backspacing (ET32 or 35mm 17x8 I believe) it was right into the spring bolt.

I THINK with a 245 and 4.5" backspacing it would work great but all 17s in 8x6.5 I can think of probably have high positive offset. Thoughts?

For a little extra info, I have some GMT400 16" steel wheels with 245 tires on them with 4.5" backspacing and they fit fine. The trailer wheels have around 4.25" backspacing.
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Old 04-10-2019, 08:04 AM   #2 (permalink)
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If you are set on 17s, you'll probably have to order up some black rock crawlers or similar. They problem then is if an 8" wheel is too wide.
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Old 04-10-2019, 09:53 AM   #3 (permalink)
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I just the wider axles 93Ē iirc? I moved the spring perches in that way I can run a real positive offset wheel to run truck take off tires.

I agree thereís no debate fuck trailer tires.
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Old 04-10-2019, 09:54 AM   #4 (permalink)
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Quote:
Originally Posted by YotaAtieToo View Post
If you are set on 17s, you'll probably have to order up some black rock crawlers or similar. They problem then is if an 8" wheel is too wide.
My trailers over legal width but the cop will be concerned about expired tags Iím sure.
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Old 04-10-2019, 10:42 AM   #5 (permalink)
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I have looked into this same thing few times but continue to just buy 1 trailer tire when they pop..... I think for an easy to find 17" wheel you are either going to be looking new (maybe custom order for backspacing) or the late model chevy 2500's right before they switched to the 180mm bolt pattern. I keep thinking 07-10 had the 17's and the 8x6.5 still and they are 17x7.5" with around 5.35"back spacing, I looked into them for on my 04 yukon also and ended up fitting my ram 17x8's just fine so didnt bother getting my hands on a set.

If my notes are right
3rd gen Ram chrome steel or alloy----------------------------- 17x8 = 6.19"BS
3rd gen Ram plain steel with square holes--------------------- 17x7.5 = 6.02"BS
07-10 GM alloy (never saw any 07+ steel local to measure)--17x7.5 = 5.35"BS

So in theory the difference in width and backspace should get you 1.34" more space between tire and bolts, also going from 265 to the 245 you want should total up to almost 2" of clearance.
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Old 04-10-2019, 11:08 AM   #6 (permalink)
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For what it's worth, I went through something similar on my trailer years ago. Mine is a 10k, with 6 lugs. I converted from 15" to 16", in order to run 245/75LT16s. I had a set already, and at the time they were cheap/easy to come by used. After looking for takeoff wheels for a while that would work, everything either had too much backspacing, or the center bore was too small. I ended up ordering the cheapest set of wagon wheels I could find. No problems since, and it tows way better now.

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Old 04-10-2019, 05:36 PM   #7 (permalink)
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spacers?

seems sketchy, but IDK.
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Old 04-11-2019, 09:05 AM   #8 (permalink)
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Thanks all, kind of confirmed my thinking. Would be a nice upgrade but I'll have to bide my time and try to find some cheap 0 offset 17x8 wheels that are no longer suitable for an 8x6.5 bro. 17x7 would probably be better, up to ~10mm positive offset.

If I buy wheels they are essentially minimum $150 each plus shipping. Makes the upgrade cost 2x as much as carrying on with new garbage tires.

Spacers would be too much hassle and near same cost as new wheels.
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Old 04-11-2019, 03:27 PM   #9 (permalink)
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I just talked to a dude that ran truck wheels on his trailer, and it quickly shelled out the bearings due to the truck rim offset. The offset places the load where it was not designed to be. I believe my 17" dodge rims have 45mm of offset.

So now plan B is to use a trailer rim with LT tire as the only spare I carry while boondocking/glamping since it should fit the truck. Instead of first using the same truck wheels on the trailer.
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Old 04-12-2019, 11:34 AM   #10 (permalink)
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Based on a sample size of 1?
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