Tire PSI

[tsnk4040]

I have a Coachman Clipper 896E with Load Star 12" tires. The side of the tires show max 90psi. What is the best running PSI? They have 70psi right now and hard has rocks.

Thanks for the help!

[flyfisherman]

I have a Coachman Clipper 896E with Load Star 12" tires. The side of the tires show max 90psi. What is the best running PSI? They have 70psi right now and hard has rocks.

Thanks for the help!

No doubt your running the 4.80 X 12" (load range "C") tires on your Coachman. And without a doubt, you need to be running 90 psi in those tires. The less air pressure in those tires means the hotter they run and the hotter they run the more likely for a blow-out.  Believe me, when you have a blow out for those high pressure 12" trailer tires, the more likely that will damage your trailer's wheel well housing (not to mention what CAN happen to the trailer itself!).

When you do wear those 4.80 X 12" tires out, swap them for the 5.30 X 12" (load range "C") tires. These will handle more weight and only require 80 psi (LOL)!

I run the 5.30 X 12" tires and to be able to pump them up (a lot of places that have an air pump will only go to 60 psi) I had to buy from Wally-Mart a little 12 volt compressor that plugs into the cigar lighter, to be able to pump up to pressure. Not all that expensive, under $20.00, but it's with the camper all the time.  These high pressure tires are notorious for losing air pressure while just sitting.




Fly

[ScoobyDoo]

Little tires don't take a lot of air to pump them up, but they MUST have the pressure. I have several compressers around the house but I can pump the 13 in tires on mine up with a good bike tire pump in less time than putting away cords and hoses. I looked at a rechargable tire pump, decided I didn't need it.

[tlhdoc]

You should run them at the rated pressure.  If the pressure is lower you will have more side wall movement which will cause the tires to heat up and could cause sway.