my boat trailer tire size is 175/80R13 ie.(13 inch tires) have air pressure at 35 psi. which i believe is about where i should have it but the tires say max. pressure of 50 psi... any thoughts on the matter ??
Assuming that you have ST rated trailer tires on your trailer, the tires are speed limited to 65 mph max. at full tire air pressure, any under inflation will degrade the tire carrying capacity and speed.
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