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Unread 07-13-2012, 08:05 PM   #1
tw_jeep
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Trailer Tires - LT vs trailer, Radial vs Bias?

Have a small 2 horse trailer that needs new tires.

Trying to decide whether I should get LT or trailer tires and then bias or radial. I am leaning to LT radials just due to actual speed ratings that trailer tires typically dont have.

With 2 axles + spare - it's 5 tires to replace. They are about 7yrs old and cracking bad in this florida heat

Any opinions?

Thanks.

Specs:
Weight: ~2200lb empty. ~3000lb with our pony in it. Rarely a 2nd horse pushing it to ~4000+lb
Axles - 2
Tire size: 7.5x16 which are equivalent to 235x85x16
Type: Unknown - some chinese brand - cant find words "radial" or "bias" on them.
Used ~12 times a year I'd guess but not evenly spread out. May sit for months then used 2-3 times in a month.

Tow vehicle is stock 2002 Ford FX-4 5.4L.

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Unread 07-13-2012, 10:54 PM   #2
Burlbook48
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You want to know if you should use Trailer Tires in a trailer application? ST rated tires are made specifically for trailer use. Why are you worried about the speed ratings of the tires? How far over the speed limit do you really wanna tow?

Myself, I'd use bias ST rated tires. Radials don't really help a trailer, different load forces than in wheel-driven vehicles. Plus, (devil's advocate voice) ... *IF* you were involved in an accident, the other side's creepy ambulance chasing lawyer could say the use of tires not rated for trailer usage contributed to your fault in the accident, whether it's true or not. It's all about what you can't make people believe in court. Yeah, sucks, but that's the litigious reality of our society today.
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Unread 07-15-2012, 06:06 AM   #3
tw_jeep
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Regarding speed - i have conflicting information on ST speed ratings - as low as 55 - which is very little margin on any kind of highway driving.

Based on a number of comments on RV forums, the quality of ST tires is often quite suspect. It seems that government oversight is less and most are made in China. Many RV owners switch to LT truck tires.

The lawyer comment is all too true.

Thanks...
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Unread 07-22-2012, 11:03 AM   #4
LouC
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Yes there has been much debate on the quality of trailer tires, that is for sure. From what I have read they are speed rated only to 65 mph. However, if you compare the load rating for their size, they can carry much more than a P rated tire and more than the same size LT rated tire. As an example, an LT rated 235/75-15 C load range tire maxes out at 1985 lbs @ 50 psi. In ST sizes you can get an ST 225/75-15 D rated tire that maxes out at 2500 or so @ 65 psi. Most LT tires in 15" sizes are C load rated. If the load rating of the LT tire matches the load you are carrying I can't see how you can be cited or sued in an accident, because trailer tires are not specifically required by law on trailers, unless your state motor vehicle code requires it. I looked for D rated LT tires in the 235/75 15 size and the only one I found was the Pirelli ATR all terrain tire. I do use ST trailer tires (Kenda Loadstar) and I have not had any trouble with them the 8 years they have been on my boat trailer.
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Unread 07-22-2012, 11:35 AM   #5
99_TJ_Wyoming
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some people have a bias for bias tires on trailers lol, I just got a trailer and the PO spent over $100/tire getting the larger bias tires, what I do know is that radials will be rated for higher speeds, and I do pull my trailer at 70mph quite regularly with my heavyass suburban, the main reason Im a fan of radials on a trailer is that they dont get as hot as fast at higher speeds, so your less likely to blow one apart, radials have better survivability at traffic speeds.
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Unread 07-22-2012, 09:12 PM   #6
LouC
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here is one tire I have found that is D rated in a 15" rim size, Pirelli ATR LT 235/75-15 rated at 2335 lbs @65 psi.

http://www.tirerack.com/tires/tires....RATR&tab=Sizes
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Unread 07-31-2012, 06:04 PM   #7
robphillips00
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St trailer tires are the biggest scam out there. Some are rated at 55 and 60 mph. They have a sorry service life as well. If you can run LT tires, you will be much happier in the long run.
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