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Recommended PSI for Jayco Trailer with ST205/75R15 Tires

Question:

Hi, My Jayco trailer has ST205/75R15 load range C tires on it that need to be replaced anyway, but I think Id like to put load range D tires on due to reports Ive read about the C tires failing on the highway. I know theyll fit they are the same size after all, but what tire pressure would I use on the D tires? 50 psi like the Cs or 65 psi as the D is rated for? Thanks.

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Expert Reply:

The psi rating for your tire to function at its best is not determined by load rating and size but specifically by the design and function of the tire. For your upgrade to load range D, you will get a higher ply rated tire and a higher weight capacity.

I recommend the Provider ST205/75R15 Radial Trailer Tire # TR20515D which is rated for a maximum load of 2,150 lbs at 65 psi. This 65 psi is what you should inflate your tires to prior to any trip (cold). The tires have automotive grade tread with sipes to move water for better traction. These tires are rated for speeds up to 81 mph.

If you want the combination wheel and tire, then I recommend # A15R645SMD for this tire and a 5 on 4-1/2 inch bolt pattern trailer wheel.

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