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Old 10-14-2011, 07:41 AM   #29
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Skatiero,
I have the same trailer you have (1989 Excella). I am on my second year towing with Carlisle radial tires LRD and work well for the traveling we do (trips have been typically 100 - 500 miles/day). No complaints. They don't loose air, don't seem to be any hotter than the tow vehicle tires on the highway and I often run 70 mph. The tires are kept at 60 psi.
These were at least $40 cheaper per tire than any Good Year Marathon and $20 cheaper than closest ST tire competitor.
I have no doubts that LT tires and those going to 16" tires have a better setup but that can be pricey.
I have probably jinxed myself and will have a blowout on the next trip.
Good Luck and don't over think this
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Old 10-14-2011, 08:56 AM   #30
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One of the main diff's between "trailer" and "LT" is the "speed rating". Most if not all "trailer" tires are rated at 65mph compared to the "LT" that could have a speed rating of 90mph or more.

If one looks at many of the old trailer tires that were put on on the rigs back in the 60's, 70's you will find it's the same exact tire you can still find today. The only difference is the name on the side, Power King, Road King, USA Trail, etc.... the tread and side wall pattern is still the same using what appears to be the same mold.
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Old 10-14-2011, 05:19 PM   #31
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Quote:
Originally Posted by crispyboy View Post
Skatiero,
I have the same trailer you have (1989 Excella). I am on my second year towing with Carlisle radial tires LRD and work well for the traveling we do (trips have been typically 100 - 500 miles/day). No complaints. They don't loose air, don't seem to be any hotter than the tow vehicle tires on the highway and I often run 70 mph. The tires are kept at 60 psi.
We have a 27 ft 1984 Sovereign. Put Carlisle ST225/75R15E's on it. Max pressure on the side says 80psi. And the Carlisle site and Discount tire will both will you to run it at the max. Now I can tell you that at 80 psi I could bounce that trailer to pieces. So we moved down to 72 psi and all seems well. Only about 2500 miles and 5 months or so on the tires.

But I simply don't know if I am running a risk by going lower than the recommended pressures. So...what to do, what to do...
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Old 10-14-2011, 07:20 PM   #32
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if one looks at many of the old trailer tires that were put on on the rigs back in the 60's, 70's you will find it's the same exact tire you can still find today. The only difference is the name on the side, power king, road king, usa trail, etc.... The tread and side wall pattern is still the same using what appears to be the same mold.
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Old 10-14-2011, 08:46 PM   #33
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Michelin LTX 235/75R15 Load Range C

18,000 miles so far. Still have 12/32nd" depth. Love 'em.

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Old 10-14-2011, 09:16 PM   #34
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18,000 miles so far. Still have 12/32nd" depth. Love 'em.

Rluhr, Are these on the Carvel or the Safari?
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Old 10-15-2011, 06:12 AM   #35
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Quote:
Originally Posted by casa3805 View Post
We have a 27 ft 1984 Sovereign. Put Carlisle ST225/75R15E's on it. Max pressure on the side says 80psi. And the Carlisle site and Discount tire will both will you to run it at the max. Now I can tell you that at 80 psi I could bounce that trailer to pieces. So we moved down to 72 psi and all seems well. Only about 2500 miles and 5 months or so on the tires.

But I simply don't know if I am running a risk by going lower than the recommended pressures. So...what to do, what to do...
Chuck,

IMO...72psi in an E rated tire is fine for your rig.(nowhere near max load). Our TV's LTX Michelin's are also E and 80 max pressure, I run them at 72F, 74R, 45k without any problems.

Bob
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Old 10-15-2011, 07:14 AM   #36
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Rluhr, Are these on the Carvel or the Safari?
These are on his Safari. You can read about all of Rich's tire issues on his blog here. His experience with these tires is a big part of why I chose them.
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Old 10-15-2011, 04:39 PM   #37
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Glad my experience was helpful to you, Lance!

I think a better link would be this one: Man In The Maze » Blog Archive » Running gear maintenance day <--- directly to my most recent blog entry on the subject.

For the full, gory, tale of our years of tire challenges and why we ended up with Michelins, check both of the blogs linked below in my signature and do a search on the term "tires."

Short version: we tried every brand of "ST" tire we could find and they all failed prematurely, until we switched to Michelin light truck tires.

YMMV. Our lightweight 1968 Caravel can run just about any tire without a problem. There's a big difference between a 17-foot, 2500 lb trailer and a 30-foot, tandem-axle 7500 lb trailer. So I don't recommend that people go to the trouble of switching unless they are having issues such as premature wear, belt separation, or short tire life.
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Old 10-19-2011, 03:30 PM   #38
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Also needing help

I'm also in need of tires & have some other questions. Have '86 Excella 32'. Returned from trip last weekend & knew before going south in Jan/Feb would need tires. Whoa!! While checking I found the rf tire had some terrible wear, primarily on inside including cupping down to metal belt. I'm thinking either really bad balance or a brake hanging up. No evidence of problem on the rb tire nor on left. Also considering aluminum wheels at same time( I've always had problem with wheel cover on one wheel spinning & pulling on the stem.) Thought I might just get away from wheel cover. Should I replace shocks at same time? Have additional questions if anyone has chance to advise me. Thanks.

RB
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Old 10-19-2011, 04:04 PM   #39
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I have had great luck with bias tires. I also fear the damage a steel belt will do to a fenderwell.
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Old 10-21-2011, 05:21 PM   #40
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I'm also in need of tires & have some other questions. Have '86 Excella 32'. Returned from trip last weekend & knew before going south in Jan/Feb would need tires. Whoa!! While checking I found the rf tire had some terrible wear, primarily on inside including cupping down to metal belt. I'm thinking either really bad balance or a brake hanging up. No evidence of problem on the rb tire nor on left. Also considering aluminum wheels at same time( I've always had problem with wheel cover on one wheel spinning & pulling on the stem.) Thought I might just get away from wheel cover. Should I replace shocks at same time? Have additional questions if anyone has chance to advise me. Thanks.

RB
RB,

If the cupping is primarily in one area of the tire,(heavy spot), it's most likely a balance problem. Worn shocks will exacerbate the problem...tire bounce.
Centramatic balancers and new shocks may be in order....along with some new shoes.

Bob
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Old 10-25-2011, 03:22 PM   #41
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So am I correct in thinking that the trend is toward light truck tires?
I try to keep up with this on various boards. I'm in favor of LT tires as a result. The second portion of that is to stay with correct load range, overall, so as to keep tire pressures at or near to sidewall maximums to keep op-temps low and sidewall stiffness high. Generally. This is my "reading" of consensus, that LT is increasingly favored, especially on heavier trailers.

Some of this info is gleaned from commercial operators who take their equipment through situations that RV'ers avoid (well, most of them). I do know that ST tires are no longer acceptable to me.

The last set we had were the YOKOHAMA RY-215s in 7.00x15 on our Silver Streak. At maximum psi (correct load rating for us; an 8k GVWR trailer; we were at .92) the temps stayed lower than on the Michelins on the truck in 105F Texas heat at 63-mph.

I'm thinking M&S Michelins for the next one. Much depends on whether tandem or tridem.

Centramatics and new shock absorbers were also done.

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Old 10-28-2011, 08:32 PM   #42
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Correct me if I am wrong, but the best ply rating on the 15" LT's is a "C" rated or 6 ply. Not saying that I won't switch the next time I need new AS rubber, but I am wondering about the toughness I will loose from a 10 ply to a 6 ply.

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