Should ST205/75R14 Trailer Tire Run At Max PSI
Updated 12/22/2025 | Published 10/05/2024
Question:
I am using a st205/75r14 8ply load range D tire , should I run the tire at max psi of 65psi? It is stamped on side of tire. Thank you
asked by: Jeremy
Expert Reply:
Hello Jeremy; the general rule for trailer tires is to always run them at their max psi. Most manufacturers intend for the tires to be inflated to the max and that is also where they get their rating for the capacity. If you run it under the max psi the tire has an unknown capacity. There are a few exceptions with brands like Goodyear but those brands will have a chart showing the capacity at various pressure ratings.
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etrailer Rubber Hitch Cover for 2" Trailer Hitches - Qty 1
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Robin H.
12/22/2025
Hey Jeremy, did running your trailer tires at the max 65 psi give you the performance you were hoping for? Knowing how it handled could help others fine-tune their tire pressure setup.