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Correct Inflation Pressure for Trailer 4.80-12 Trailer Tires


What if the tires I have say trailer tires but are not marked ST? Do I still inflate to Max pressure. Carlisle 4.8 - 12.0 sport trailer


Helpful Expert Reply:

Tire size 4.80-12 is not found on vehicles, but is a common trailer tire size on smaller utility- and sport-type trailers. In trailer use you do want to inflate them to the maximum cold psi pressure noted on the tire sidewall. Trailer tires should never be under- or over-inflated since they can deliver their rated weight-carrying capacity only when inflated to their specified pressure. Incorrect inflation can lead to excessive heat which is the main cause for tire failure.

All of our tires in this size are shown on the linked page; note these vary in their rated pressure. Most require 90-psi but a few are rated for 60-psi.

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