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Old 09-25-2013, 11:20 AM   #21
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You could probably get a good price for them on Kijiji or elsewhere. I sold my 3 remaining LR - Cs for $20 each to a guy wanting them for his older hunting unit. The factory rep / salesman was probably just trying to appease you and IMO his answer sounds pretty lame, since a lot of RV owners have no idea of the carrying capacity of their tires or axles.
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Old 09-25-2013, 12:42 PM   #22
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Originally Posted by Windywest View Post
What kind of rims do you have ? My Flagstaff 5er came with HWT Series 6, 15" X 6, usually the manufacturer will have the rating stamped on the back side of the rim. Series 06 - HiSpec Wheel & Tire, Inc. - The Safety Wheel

70 mph is over the limit for most trailer tires, but I know it's hard to keep those Ford 6.7L diesels at 60 mph, power to spare.
I have posted this before, but Greenball makes a trailer tire which is rated at full load capacity at 75 mph.
Greenball Tires - Towmaster

They also make a tire for higher heat situation called the summer solution, which I will be installing on my trailer soon.

Greenball Corp
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Old 09-25-2013, 01:51 PM   #23
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Thanks for that info, I wasn't aware of Greenball's higher speed ratings since there doesn't appear to be anywhere (that I know of close to me) in Canada that sells them, and there isn't any place in Canada that you can legally drive at 75 mph. The Greenballs are made off-shore like all the rest, but perhaps they have better quality control, good luck with your new tires.
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Old 09-25-2013, 02:06 PM   #24
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There are also TPMS that will monitor temps as well. These should give you plenty of time to pull over before an event occurs. I just picked one up at the Hershey RV Show. Actually made for tractor trailer rigs. I got the standard 6 sending units, 4 for trailer and 2 on rear of truck.
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Old 09-27-2013, 12:07 PM   #25
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We have a 2013 Rockwood 8289WS and had one tire this past week drop to 13 lbs, so I inflated to 48 psi and two days later it had dropped to 45.5 lbs. As I had read all the horror stories about exploding tires before buying I had planned on replacing next year (after 5000 miles) but with the pressure drop issue decided to pull the plug early as we have a 1000 mile round trip planned for October. My local tire dealer suggested that D LR would be ok but for $10 more per tire to go with LR E Carlisles. So with new tires and a large safety measure I feel more confident about a safe trip w/o tire issues. Dealer also gave me $10 trade in on each of the tires.
I have read about the problems with the Trail Express tires. When we picked up our 8289WS in July I had concerns about the 2500 mile trip home. However we now have over 4000 miles and no problems. I keep the pressure at 50 psi and visually check for defects both before leaving on a trip and during the trip. So far so good. Had planned to move up to a LR D when I do replace them. Didn't think there was enough room between the tires to handle a LR E.
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Old 09-27-2013, 01:26 PM   #26
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I have read about the problems with the Trail Express tires. When we picked up our 8289WS in July I had concerns about the 2500 mile trip home. However we now have over 4000 miles and no problems. I keep the pressure at 50 psi and visually check for defects both before leaving on a trip and during the trip. So far so good. Had planned to move up to a LR D when I do replace them. Didn't think there was enough room between the tires to handle a LR E.
I made it to 6000 miles before I had a blowout. Kept the pressure at 50 lbs. Drove through Needles Calif. at night by my temp gun the asphalt was 110 degrees at 10:00PM. Decided to cross the desert at night being the day time air temp was going to be 115 that next day. I can't imagine what the road temp would be then. But we made it on the OEM from Virginia to Oregon and back without an issue. Then the next trip it happened in Lumberton NC. Blew the rear tire. Bought all new Marathons 225X15D,ST. So you just never know. I'm pretty anal about my tires, they can ruin your day.
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Old 09-27-2013, 01:41 PM   #27
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Originally Posted by Rsharrer View Post
I have read about the problems with the Trail Express tires. When we picked up our 8289WS in July I had concerns about the 2500 mile trip home. However we now have over 4000 miles and no problems. I keep the pressure at 50 psi and visually check for defects both before leaving on a trip and during the trip. So far so good. Had planned to move up to a LR D when I do replace them. Didn't think there was enough room between the tires to handle a LR E.
I suspect you have ST225 75R 15 on your trailer, to my knowledge changing load range doesn't change the tire dimensions. I changed out all my tires from C to E, and the tire size stayed the same, just the tire capacity changes. I still have the same space between my tires that I had before the change. Have attached an article from etrailer on a similar issue. http://www.etrailer.com/question-32697.html
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Old 09-27-2013, 10:46 PM   #28
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Hello all,
I just bought a new 2013 8286WS back in July and have 3 trips on it totaling about 2500k miles. Yesterday we were heading home northbound on 680 in San Jose and blew a tire all to shreds. Before leaving the Flying Flags RV park in Buelton that morning I checked the pressure and all tires were between 47-50 PSI. (225-75R-15C 5ply).

After changing the tire I got looking at the writing on the sidewall and comparing to the Spec tag on the side of the trailer. My GVWR is 9480 while my tires rating at a Load range "C" is only 8600. I realize the tongue weight needs to be added in there as well, but as a former Truck Driver I could not believe that the stock tires were not rated to handle the entire weight of the vehicle.

A CHP happened to stop by while we changing the tire and he was even saying that load range "C" tires on this trailer was rediculous. I realize I have no recourse to go after the MFG because technically the tires are rated for the weight of this trailer when tongue weight is included but they are borderline at best. I would hope that in the future Forest River would spend the extra $6.00 per tire and put a load range "D" on there which is a 7 or 8 ply tire rated at 2500# each.

While I can't prove that weight was the issue that caused the tire to fail, it's going to cost me about $550 to replace all of them, small price to pay for safety but worth it.

I'm just curious if anyone else had had similar issues with their tires on a new Rockwood or any other FR trailer for that matter.

G
A few points. Not sure what you mean by "5 ply". Ply Rating is very old terminology.
Load capacity for an ST225/75R15 LR-C is 2150# at 50 psi cold inflation.
Do you know what your TT actually weighs when fully loaded for a trip?
Your tag also identifies GAWR which is the MAX load on an axle which must be matched by the tire capability.

LR-D would give you 2540# for each tire but that might exceed the axle capacity.

You need to get the TT weighed. I doubt that the tire failed simply because of the load. How do you know for certain you did not have a puncture or some other damage or valve leak that caused air loss?
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Old 10-11-2013, 06:23 PM   #29
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I have a 2010 Rockwood 8280WS with 15" load range C tires. Does anyone know the rim rating for this unit. I am thinking of going to load range D, but don't know if the rims are rated for 65 PSI. I'll probably go to the load range D, even if I only run them at 50 psi, just for the extra margin on the tire. I have weighed the loaded trailer and have about 7200 lbs. on the axles, but am switching to an F350 4WD TV, and am concerned that I won't be able to adjust to level ride, in which case the rear axle will see more load, although I think I will still be less than the single axle rating or the LR C tire rating. I am also investigating getting the trailer raised, but with the torsion axles, that is not straightforward.
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Old 10-12-2013, 06:33 AM   #30
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I have a 2010 Rockwood 8280WS with 15" load range C tires. Does anyone know the rim rating for this unit. I am thinking of going to load range D, but don't know if the rims are rated for 65 PSI. I'll probably go to the load range D, even if I only run them at 50 psi, just for the extra margin on the tire. I have weighed the loaded trailer and have about 7200 lbs. on the axles, but am switching to an F350 4WD TV, and am concerned that I won't be able to adjust to level ride, in which case the rear axle will see more load, although I think I will still be less than the single axle rating or the LR C tire rating. I am also investigating getting the trailer raised, but with the torsion axles, that is not straightforward.
If you have a 5 spoke rim your rated at 65lbs. It will carry a load "D" tire no problem at all, but I would not run them at 50lbs of pressure they should be rated at 65lbs cold air, run them at 65.....
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