What is the Correct Cold Tire Pressure for a ST215/75R14 Trailer Tire

Question:

what is the tire pressure for st215/75r14 trailer tire. i purchased a spare from you .

asked by: Paul S

Expert Reply:

The correct tire pressure for a trailer tire will be indicated on the tire sidewall. Trailer tires should always be inflated to the full cold psi pressure noted on the tire. They should never be run under- or over-inflated since this can reduce their load capacity and lead to overheating.

Tires will vary in their required pressure based on their rated load range. For example, the linked page will show you radial tires in the ST215/75R14 size you referenced. The D-range tire # TTWTRTM2157514D requires 65-psi, the C-range tire # TTWTR21514 requires 50-psi.

expert reply by: Adam R