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Old 10-13-2016, 05:12 PM   #11
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I put the newer HDs on and just got back from a 3000 km trip and they towed very well. We drove through some very strong winds with little or no sway. (our Jayfeather 242 is a low trailer however). They are narrower and have a much stiffer sidewall then the GY Marathons they replaced, if they last I will be a "happy camper!"
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Old 10-13-2016, 06:20 PM   #12
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Originally Posted by RVhiker View Post
Here's one of the Carlisle Radial Trail RH tires that was on my trailer; it's seeping just a little bit of air.

This tire was on the right rear axle. I have a TPMS and keep my tires at 80-PSI; while the TPMS worked, my first knowledge of a problem was a rather loud explosive noise caused by the tire in the picture.

It is certainly possible that the tire sustained some road damage somewhere, but none that I remember. It was the rear tire on the right hand side; seems like the front tire would usually be the one to get road hazard damage. I check my tires for issues before moving the trailer and at each fuel fill up (and have found two bulging ready to pop tires by doing so). In this case, I had no clue something was about to happen. The tire has about 15,000 towing miles on it and was installed in June, 2015.

I'm just filing this happening - my first tire blowout ever. I've bought four new Carlisle Radial Trail HD tires. I'll post my experience with them here.
RV,

Sounds like everyone made it out ok considering the blowout. Glad to hear. Hopefully the trailer did as well!!!

As for the front vs rear tire being damaged, from what I have been told is the front tire will kick up a nail or screw (or whatever it may be...) that's laying on the road, and you can guess where it ends up the majority of time once it is "mobile", yes sir the rear tire!!!

Keep us posted how the HD's work out for you!!!

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Originally Posted by Knottybird View Post
Remember that ST rated tires are only rated to 65mph they can blow out at higher speeds. I had 4 carsile tires separate around the side wall to the tread where one could see the steel cords, lucky only one blewout. I use to drive at the speed limit ie 70 mph.now u don't go over 65 when towing.
There are actually some ST tires that have a higher speed rating from what I have heard, with Carlisle being one of them per the gentleman I spoke with at Carlisle about a year ago. The speed rating does vary a little depending on size: I think 14" was the same as the 15" RH's (he said the new tire would be the same as well) which is 81mph, and the 16" RH is 75mph if I recall correctly.

While I don't suggest going faster than about 65ish, it is nice knowing there is a "reserve" between travelled speed and the speed rating of the tire.
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Old 10-14-2016, 05:09 AM   #13
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"Special Trailer (ST) Tire Speed Ratings

Industry standards dictate tires with the ST designation are speed rated to 65 MPH (104 km/h) under normal inflation and load conditions.
However Goodyear Marathon and Power King Towmax STR tires featuring the ST size designation may be used at speeds between 66 and 75 mph (106 and 121 km/h) by increasing their cold inflation pressure by 10 psi (69 kPa) above the recommended pressure for the rated maximum load.
Do not exceed the wheel's maximum rated pressure. If the maximum pressure for the wheel prohibits the increase of air pressure, then maximum speed must be restricted to 65 mph (104 km/h).
The cold inflation pressure must not exceed 10 psi (69 kPa) beyond the inflation specified for the maximum load of the tire.
Increasing the inflation pressure by 10 psi (69 kPa) does not provide any additional load carrying capacity."


need-a-vacation your right, but you need to look at the system, not just the tire, in general it's 65. When my carsile blew out I was lucky we were home, parked just sitting. Looking at the three remaining tires I saw the steel cords these were 185/75R-13ST very hard to find. Our new camper has 205/R-14ST, I should have ordered the BAJA package just to get the 235/75R-15ST.
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Old 10-14-2016, 07:49 AM   #14
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Quote:
Originally Posted by Knottybird View Post
"Special Trailer (ST) Tire Speed Ratings

Industry standards dictate tires with the ST designation are speed rated to 65 MPH (104 km/h) under normal inflation and load conditions.
However Goodyear Marathon and Power King Towmax STR tires featuring the ST size designation may be used at speeds between 66 and 75 mph (106 and 121 km/h) by increasing their cold inflation pressure by 10 psi (69 kPa) above the recommended pressure for the rated maximum load.
Do not exceed the wheel's maximum rated pressure. If the maximum pressure for the wheel prohibits the increase of air pressure, then maximum speed must be restricted to 65 mph (104 km/h).
The cold inflation pressure must not exceed 10 psi (69 kPa) beyond the inflation specified for the maximum load of the tire.
Increasing the inflation pressure by 10 psi (69 kPa) does not provide any additional load carrying capacity."


need-a-vacation your right, but you need to look at the system, not just the tire, in general it's 65. When my carsile blew out I was lucky we were home, parked just sitting. Looking at the three remaining tires I saw the steel cords these were 185/75R-13ST very hard to find. Our new camper has 205/R-14ST, I should have ordered the BAJA package just to get the 235/75R-15ST.
But with the p*** poor brakes that RV's have I don't think I would want to drive at over 65 mph
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