RV Tires - Page 11 - Fiberglass RV


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Old 03-31-2016, 10:22 AM   #141
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Name: RogerDat
Trailer: 77 Scamp 13
Michigan
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I bet this has already been said in one of the prior 140 posts but speed really matters to tire failure, heat is the real enemy but speed generates heat.

Generally speaking ST tires tend to have a lower speed rating, now me I drive slower when towing so no big deal but once you go over the speed rating of the tire you sort of find uncharted territory.

A tire that might last one person 5 years in a cooler climate at lower speeds might last only half that in a hotter climate at higher speeds. With tires it seems like they can suddenly fail because some often unknown threshold was crossed. Short of having temp and air pressure monitoring of tire it can be hard to tell exactly what it was that contributed to the failure.

Whatever you choose check often, inspect closely, and know the limitations of that brand/model/style.
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Old 03-31-2016, 10:59 AM   #142
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Name: Norm and Ginny
Trailer: Scamp 16
Florida
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We've had ST tires for 8 years, Goodyear Marathons, travel on them for 7 months a year and have yet to have a failure. We keep them stiff at 50 psi.
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Old 03-31-2016, 11:14 AM   #143
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Name: RogerDat
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Quote:
Originally Posted by honda03842 View Post
We've had ST tires for 8 years, Goodyear Marathons, travel on them for 7 months a year and have yet to have a failure. We keep them stiff at 50 psi.
Running at high end of tire rated pressure is another way to prevent heat. Hiya Norm have not run across your posts in awhile. Was thinking about those under floor storage bins you posted about for this season.
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Old 03-31-2016, 01:16 PM   #144
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Name: Norm and Ginny
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Low pressure increases flexing producing more heat. As we go north we'll be adding air to our tires. Other ways to decrease heat is of course to slow down. We're generally in the 55-60 mph range and usually are not towing in the afternoon, typically peak heat.

Roger, we still have those under trailer storage boxes.
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Old 03-31-2016, 03:29 PM   #145
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Trailer: Li'l Hauley
Oklahoma
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Changing from 14s to 15s is mainly done if your trailer weight is close to the tires' capacity and you want more cushion.

Plenty of people have had trouble with ST tires and have switched to LTs. But there are no scientific studies; it's all anecdotal evidence, so it all depends on what you're comfortable with.

I have had 2 ST tires blow and 1 lose its tread in the past, oh, I think 5 years. I am still running STs but I am now selecting those with a 75 mph speed rating or higher, to see it that helps.
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Old 04-03-2016, 06:27 PM   #146
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Name: Val
Trailer: 1988 Bigfoot Deluxe B19 19 ft / 2007 Nissan Frontier V6 NISMO 4x4
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Thank you your responses, all! It seems that everyone has a different experience with tires.

I have to admit that I am taken aback by the potential cost of having to replace my travel trailer tires every 3-4 years when my truck tires (and brakes) lasted 7 years.

I have also been told by tire sales reps that ST tires have firmer sidewalls, and I have also read that as Jim says, the firmer sidewalls in a higher-ply make for a much less bouncy ride, which is important to me, but then what Tom says about the specs for the Kuhmo Radial 857 in size 205R14C makes a lot of sense and this is the 2nd time someone in the FGRV community has recommended that particular tire (thanks, both of you).

Thanks, Roger, Norm and Ginny on the reminder about the importance of proper inflation and speed!

Thanks, Mike, for explaining the rationale for upping the tire size. Even though I would not expect to exceed 60-65 mph maximum ever when towing, I would definitely want the higher speed rating that you mention. I really do not want to experience a blow out if I can avoid it.

Luckily or not, I have some other exterior work on the TT to do myself first and then some other budget priorities, so will probably be waiting until summer's end to get new tires and then have my trusty mechanic install new brakes, bearings and shocks at the same time.

Meanwhile, I will have some more time to research what travel trailer users say about the Kumho Radial 857 205R14C versus the Maxxis ST M8008 (which I think are available in the 14" on some sites). Reading the forums, it sounds like there are some important distinctions between using tires on 5th wheels, RVs and travel trailers in terms of how the bulk of the weight is distributed at rest and in motion (RVs being more similar to trucks because of their front axle performing steering functions, while 5th wheels and travel trailers just follow the steering from the tow vehicle). Sometimes I find that there is more online than I really want to know, but I would rather be over-informed than under-informed... as long as I can finally find something that is reliable and fits my budget!
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Old 07-20-2017, 12:43 PM   #147
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Name: Hans
Trailer: Bigfoot 25FB
Texas
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New Goodyear 10-ply or E-Rated Trailer tires

I wanted to put 10-ply or E-Rated trailer tires on my 25' Bigfoot travel trailer. I wore out the original Goodyear Marathon D-Rated or 8-ply tires in about 22,000 miles. To be clear, this was primarily due to seriously bent axles. After replacing the entire suspension system (axles upgraded to 6,000lb, brakes to 12", hubs and wheels to 6-bolt and steel 2,850lb capacity), I wanted to install 10-ply or E-Rated tires so that I had the ability to inflate to 80psi. Believe me, I have the load to justify carrying capacity. I was going to install Maxxis 8000 tires in March 2017 when my tire shop informed me of a new (January 2017 release) Goodyear Endurance 10-ply tire. I was a bit skeptical to give Goodyear another try.

I now have over 6,000 miles on these tires, and they are performing wonderfully. I run them at 70psi. They came in at a very good price of $123/tire or $580 for four mounted and balanced. One last comment about balancing your trailer wheels. I had heard varying and conflicting opinions about doing this, from "waste of money" to "do it or else". I will not hesitate to do it EVERY time. I was shocked at the amount of lead weight they put on my steel wheels to get them balanced. For those of you who know about this, they put about 3ozs per side on most of the wheels! Suffice it to say, "That's a lot!"
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Old 07-20-2017, 03:32 PM   #148
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Name: Dan
Trailer: Bigfoot 30th Anv. 25B25FB
Washington
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Bigfoot25....curious as to your rims....original ones that came with the trailer? What is the psi rating on the rims?

Thanks
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