Should Tires be Filled to 65 psi Rating on Sidewall Instead of 50 from Dealer

Question:

I have 225/75R15 tires on my 5th wheel. The PSI on tire indicates 65. When I picked the trailer up from my dealer, the psi in my tire was 50. Should it be 65 when Im towing with it loaded.

asked by: Steve

Expert Reply:

If your 225/75R15 tires, like the Taskmaster # TA24VR, have a 65 psi rating on the sidewall then you definitely need to make sure they are at 65 and not 50 psi. A different psi rating will result in different (typically unknown) load and speed ratings and can result in a blow out due to overheating.

Be sure that your tires are cold when testing the psi in them. Cold just means that they have been sitting for a long time (like overnight) and that there isn't any heat build-up. If you were to test the psi after running the tires then the psi rating would be exaggerated even if you have them at the recommended 65 psi rating.

expert reply by: Jon G