jmvx2 wrote: Just put new tires on my 08 Jazz 3300, 36' 5th wheel. The old ones were Transmaster 235/80-16 E. Tread was about 50% but the DOT date codes put two at 10 years old and two at 11 years old. I guess the dealer or mfg. swapped out the D tires for older E tires before I bought it, As I did buy this trailer new with these tires. Sticker on trailer calls for same size tire, but load D rating at 65 psi. As my weight on the tandem axles ran 9400+/- lbs, I ran 70-72 psi on the E tires.
It is always stored under roof in shade and the tires had absoulutly no signs of cracking or weathering. Only reason I changed was needed to replace some tires on a offroad farm trailer, so put the new rubber on the 5th wheel. Considering all the horror stories on ST tires I think I did quite well. Always checked pressure before hitting the road and checked them visually and for temperture anytime stopping for breaks. I also usually keep my speed ~60mph max while towing.
Anybody else get this kind of life out of ST tires?
Oh... I put BF Goodrich Commercial TA, 235/85-16 E tires on this time.
I don't understand why a dealer would replace OEM tires on a 5er, with "old tires", and as you stated, you purchased the unit "new". I don't get it...I'd raised cane if I purchased a brand new 5er in 08 and it had tires on it that were already 6 to 7 yrs old ..makes absolutely NO sense at all.. The DEALER would have put new tires on the 5er before I took it off the lot....again, just doesn't make any sense.
What LT tire are you using to tow with, that will handle the sidewall pressure a 5er can put on the tires that states you can tow with it at 99 mph???? Who would want to???? I think 70 is too fast to tow, but I'm not real smart...I also believe your thinking is skewed on how much weight the tires will handle....they will handle what is posted on their sidewall, whether you tow at 55 mph with max side wall psi, or whether you tow with them at "99mph". at max sidewall pressure....still the same weight rating...it is what it is....
Just don't understand why an 08 5er would have tires on it that are 10-11 yrs old just 4 yrs later, just doesn't make sense
Jim & Kathy
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jmvx2 wrote: On of the biggest differences in weight ratings between ST and LT tires is the speed rating. ST are rated at a max of 65 mph, whereas my LT's are rated at 99 mph.
just an fyi. The speed rating on my carlisle radial trails (ST) is "S", 106 mph.
1st set three years and they were Mission tires, 2nd set three years and they were Milestar tires, all from China. Just set up to put 4 new Maxxis 8008 LRE with new rims from Trailer tire and wheel. These have got to be better...lol
jmvx2 wrote: On of the biggest differences in weight ratings between ST and LT tires is the speed rating. ST are rated at a max of 65 mph, whereas my LT's are rated at 99 mph.
just an fyi. The speed rating on my carlisle radial trails (ST) is "S", 106 mph.
I can understand a speed rating of 65-70 possibly being signifcant or as "information needed", but why in the world would 99 mph or 106 mph rated ST tires even be something that would be considered when purchasing a tire for one's 5er?
I'd be more concerned with who manufactured the tire, what their load range is and how much air pressure is needed to attain that load range....being able to go 65+ mph up to 100mph isn't really a part of the formula I follow.
106 mph is a number. But it indicates the amount of heat that can be tolerated as the tire rotates, and goes from being unloaded to fully loaded with the weight it's carrying. The bulge at the bottom, right?
Bias ply tires really dont like doing that. If you drive 60 with bias ply tires, you are running them at their extreme end of tolerance. Radials are much better at the loading/unloading cycle and dont heat up as much.
It's the heat that makes everything come unglued as it were. A tire rated to withstand the heat generated at 106 mph "fully loaded", is most likely going to work more reliably at 60 than a bias ply tire that's max rated for 60. The bias ply tire is pretty much cooking itself to death.
RVUSA wrote: 106 mph is a number. But it indicates the amount of heat that can be tolerated as the tire rotates, and goes from being unloaded to fully loaded with the weight it's carrying. The bulge at the bottom, right?
Bias ply tires really dont like doing that. If you drive 60 with bias ply tires, you are running them at their extreme end of tolerance. Radials are much better at the loading/unloading cycle and dont heat up as much.
It's the heat that makes everything come unglued as it were. A tire rated to withstand the heat generated at 106 mph "fully loaded", is most likely going to work more reliably at 60 than a bias ply tire that's max rated for 60. The bias ply tire is pretty much cooking itself to death.
Do know a "tad" about tires, my company manufactures Continentals and Generals...your right about the heat, but that usually comes from overloading tires or running low pressure...speed can also affect heat, but bottom line, I'd be more concerned about load range and max sidewall psi than how fast they can run....if the tire has a speed range of 99 or 106, then it'll run cooler, if properly inflated and used in it's proper application. Buying a lower load range tire that is speed rated at 106 doesn't mean the tire is going to carry more load running slower, just don't work that way.
Haven't see very many tires, even used on TT's and 5er's that were only rated for 60 mph, most are 65, or higher...mine is higher, Goodyear G614RST's, but I still only run 55-62 mph..hit 65 sometimes, but will slow it back down when I do...now a day's, to me anyway, it's more about MPG than MPH......
Quote: What LT tire are you using to tow with, that will handle the sidewall pressure a 5er can put on the tires that states you can tow with it at 99 mph???? Who would want to???? I think 70 is too fast to tow,
Did not say I tow at 99 mph. Just stated what the swpeed rating of the LT tires I put on are. Being in Ca., we are limited to 55 mph although like almost everyone I push it some, more like 60+/- mph on freeways.
2007 Dodge 2500 QC 4x4, 6.7 cummins, auto, 3.73 gears, Pullrite rail mount hitch.
08 Jazz 3300(Thor of Ca.) 36', triple slide, King bed, 11,500-12,000lbs "Don't bad mouth farmers with a full mouth!"
RVUSA wrote: 106 mph is a number. But it indicates the amount of heat that can be tolerated as the tire rotates, and goes from being unloaded to fully loaded with the weight it's carrying. The bulge at the bottom, right?
Bias ply tires really dont like doing that. If you drive 60 with bias ply tires, you are running them at their extreme end of tolerance. Radials are much better at the loading/unloading cycle and dont heat up as much.
It's the heat that makes everything come unglued as it were. A tire rated to withstand the heat generated at 106 mph "fully loaded", is most likely going to work more reliably at 60 than a bias ply tire that's max rated for 60. The bias ply tire is pretty much cooking itself to death.
Do know a "tad" about tires, my company manufactures Continentals and Generals...your right about the heat, but that usually comes from overloading tires or running low pressure...speed can also affect heat, but bottom line, I'd be more concerned about load range and max sidewall psi than how fast they can run....if the tire has a speed range of 99 or 106, then it'll run cooler, if properly inflated and used in it's proper application. Buying a lower load range tire that is speed rated at 106 doesn't mean the tire is going to carry more load running slower, just don't work that way.
Haven't see very many tires, even used on TT's and 5er's that were only rated for 60 mph, most are 65, or higher...mine is higher, Goodyear G614RST's, but I still only run 55-62 mph..hit 65 sometimes, but will slow it back down when I do...now a day's, to me anyway, it's more about MPG than MPH......
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..makes absolutely NO sense at all.. The DEALER would have put new tires on the 5er before I took it off the lot....again, just doesn't make any sense.
