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I'm ready............
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Author:  ridepate [ Sat Jun 04, 2011 8:16 pm ]
Post subject:  I'm ready............
I hope............The trailer had brand-new 225/75R15 tires on it when I bought it. They were not trailer tires, and only rated @ 1250#. Had several friends say "awe hell, they'll be fine". They won't be the one on the side of the road in 90-plus heat changing a blow-out........So went with these Gladiator QR25-TS, E rated trailer tires with 2830# @ 80 PSI. But 80 PSI ??? With heat transfer from very hot pavement, I'm kinda scared to start out @ 80.

Thought I'd start at 70 and keep a check on them on our up-comming road-trip.
Bought two new wheels too at Northern-tool,(42.00 ea.) now I've got two spares.

Image
Author:  230 Mike [ Sun Jun 05, 2011 12:36 am ]
Post subject:  Re: I'm ready............
Nice job. The people who say "Aw hell, they'll be fine" are usually the same people who say "Watch this" right before the ambulance is called. As to the pressure - tires will run hotter as you decrease pressure. The cold inflation pressure molded into the sidewall accounts for pressure increase while running. Generally it's best for the tires to run them at max pressure.
Author:  jvthundercat [ Sun Jun 05, 2011 8:11 am ]
Post subject:  Re: I'm ready............
It is a good idea to run the rate pressure in a trailer tire. Anything below that will cause flexation in the sidewall and it generates excessive heat at the point of connection between the cap and sidewall. This will possibly lead to a blow out.
Getting an E rated tire is the smartest thing to do, but it won't help to run less pressure in it.
Author:  taz42169 [ Sun Jun 05, 2011 9:08 am ]
Post subject:  Re: I'm ready............
How much did you pay for those tires? I need some new shoes as well. P/O has similar (1250) lb rated on my trailer.
Author:  LouC [ Sun Jun 05, 2011 9:37 am ]
Post subject:  Re: I'm ready............
A passenger 225/75-15 would usually be rated at about 1874 at 44 psi, but used on a SUV or RV they have to be de-rated to 91% of capacity, so that's only 1705 each, for a total of 3410. A C rated trailer tire 225/75-15 would be rated at 2150 @50 psi, for a total of 4300 lbs and a D rated tire in the same size, 2540 @65 psi. For that boat and trailer, the passenger or p rated suv tires would have been inadequate, but the trailer tires in the same size would be fine, even the C rated 225s, although the D rated ones give more safety margin. Tires built for light truck and trailer use can be used at their full rated capacity, unlike using a P rated tire on a SUV or trailer. But you need to always run them at the right inflation pressure. An E rated tire will do fine, probably overkill for a single axle trailer with a 19 ft boat, but make sure you run them at the max psi. Running them at less will make the tire run hot and fail. Take a look at this chart, it gives you a guide of how much different size RV and trailer tires can support at different inflation pressures.

http://www.goodyear.com/rv/pdf/rv_inflation.pdf
Author:  ridepate [ Sun Jun 05, 2011 10:54 am ]
Post subject:  Re: I'm ready............
Thanks guys. I was thinking backwards on the air-pressure then. I'll fill'em to 80.
Author:  ridepate [ Sun Jun 05, 2011 10:59 am ]
Post subject:  Re: I'm ready............
taz42169 wrote:
How much did you pay for those tires? I need some new shoes as well. P/O has similar (1250) lb rated on my trailer.

taz-
Bought them here-

http://cgi.ebay.com/ebaymotors/TWO-2-NE ... 43a74f34e8
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