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Old 10-16-2019, 11:59 AM   #1 (permalink)
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Downside to 17.5ís on trailer

Iím building a multi use trailer to haul my 4 runner and firewood. Itís going to be 18 ft with twin 7,000lb axles. My original plan was to run 235 85 16 truck tires since trailer tires suck. Then I started looking at 215 75 17.5ís and 235 75 17.5ís. I know the 17.5ís are way overkill for the trailer but blowing tires when hauling sucks. For the wood I will be on shitty forest service/ potholed mt roads and thatís my only concern with the 17.5ís, but theyíre tough and should be able to handle the abuse. My buddy blew 2 235 85 16ís destroying one wheel in the process. Granted the tires were a few years old and the trailer was maxíd out for the tire capacity. So whatís everyoneís thoughts? 235 85ís or something in a 17.5 flavor? Cost is far less of a concern than reliability. Thanks in advance for any advise. Btw Iíve never dealt with 17.5ís so Iím pretty ignorant about them other than theyíre stiff and bounce when unloaded
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Old 10-16-2019, 12:10 PM   #2 (permalink)
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Goodyear endurance are suppose to be the cats meow for 16s.

215 17.5s suck, nut up and go 235. You have continental, and all the other wang chung brands.
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Old 10-16-2019, 01:19 PM   #3 (permalink)
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Fwiw, you can get 14-16 ply 16" trailer tires.

I'd just go with 235/85r16 truck tires.
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Old 10-16-2019, 02:03 PM   #4 (permalink)
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I run 4400lb rated 14ply 235/85r16’s @ 100psi on all my trailers. I’d only spend the extra to move to a 17.5 to get a single wheel setup on a 10/12k axle otherwise the 16’s are a lot more available.
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Old 10-17-2019, 09:34 AM   #5 (permalink)
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I spent the day training on a train that used 245/70(?)R17.5, with 6k load rating each, I fell in love.
I should also say I run 19.5s on my dodge.
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Old 10-17-2019, 11:21 AM   #6 (permalink)
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I understand you can get 12 and 14 ply heavier rated 235 85 16ís and Iíve looked at that as well. It seems like 17.5 wheels are also much heavier duty. The when that we destroyed a couple weeks ago looked like a damn flower after 1/4 mile (we think) of potholed road after the tire went flat. It was dark, I was following, and it had air a short time before I noticed it was flat.
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Old 10-17-2019, 12:12 PM   #7 (permalink)
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If anything I would go to 19.5 since you can always find service truck takeoffs in 225\70r19.5 and they are as heavy as a 17.5 but easier to run across in case of stranded flat.
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Old 10-17-2019, 02:10 PM   #8 (permalink)
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The average take off 225/70r19.5 is only good for just under 4k lbs, the 235/75r17.5 or 245/70r17.5 are usually 6005lbs.

Boar has aluminum and steel 19.5” wheels for trailers though now, it’s a good mid level option.

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Old 10-17-2019, 03:29 PM   #9 (permalink)
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Quote:
Originally Posted by wahlstrom1 View Post
The average take off 225/70r19.5 is only good for just under 4k lbs, the 235/75r17.5 or 245/70r17.5 are usually 6005lbs.

Boar has aluminum and steel 19.5Ē wheels for trailers though now, itís a good mid level option.
The weight rating of either is plenty Iím just trying to get a ďtougherĒ tire...I know weight rating/tough kinda go hand in hand though. Trying not to be much over 32.5 tall in the tire dept though since I donít want the trailer to be a skyscraper.
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Old 10-17-2019, 03:37 PM   #10 (permalink)
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We have them on our trailer. I don't know that there'sa better option but here'smy experience. First off our trailer is a heavy bitch. 22-24k lbs loaded. A lot of that gets transferred to the truck so I don't know what the tires are holding. We've had 4 blow outs in the past 50k miles. All full tread, in date tires. All on I40 between Little Rock and Nashville. That is a rough ass stretch of highway. It's difficult to get them in a roadside situation. We carry a spare and have never blown one while on the spare but it lingers in my mind. Our trailer is too heavy to limp on 3 tires. They're expensive as fuck. Typically $350'ish mounted, disposal and tax.
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Old 10-17-2019, 09:25 PM   #11 (permalink)
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I run them on my goose, and love them..

Back story was, I was rebuilding a trailer with 8K axles and had mismatched rags for tires. Originally it would have had 12.50-16.5's on it, which are $400+ each, and i didn't have rims for.. 235/85 truck tires weren't nearly heavy enough, and 235/85 14ply's are also spendy as hell...

I was in the process of piecing together a set of E rated 285/75-16's(3750lbs each), when I caught a craigslist ad for "5-215/75-17.5's on rims for $560"
After driving 5 hours to meet a guy at a gas station parking lot, they turned out to be 235/75-17.5's, all 5 brand new on new rims... for $560... The story was he worked for a trailer shop and they had pallets of them, that he was reselling?? A co worker of mine later picked up 20 more off the same guy for the same price.. stolen? price fuck up? or really that cheap by the container load? who knows...


4 years later, so far so good. I love that they hold 6200lbs each @128psi, and have absolutely zero rolling resistance, even when loaded heavy. I also love how cool they run when loaded down...

The things I don't like, are the height, at 32" tall, its hard on suspension and brakes... and the price if i ever have to replace them
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