Will 5.30-12 Trailer Tires Fit In Place of 155/80-12 Trailer Tires on a Tent Trailer

Question:

I have a 1997 Rockwood tent trailer with 155 80R12 tires. Load capacity is 990 per tire. I am considering replacing them this size isnt available with 5.30x12 bias ply tires with a little more load capacity. Will this work? THANKS!!!

asked by: Michael R

Expert Reply:

A 155/80-12 is definitely not a common trailer tire sized, though it may have been at one time. It sounds more like a car tire size which should not be used on a trailer. The trailer tongue or frame should have a sticker or plate that indicates the size it requires. If it does say 155/80-12 you will need to go with the closest match since that since is no longer available.

The 5.30-12 tires are going to be very, very close. They will be only 1/2 inch more narrower and 0.2 inches taller so they should work just fine for you.

Please note that tire and wheel combo # AM30740 is rated for 840 pounds at 55 psi and the wheel has a 5 on 4-1/2 bolt pattern. For a higher capacity in the same size and wheel bolt pattern you could use # AM30820 rated for 1,045 pounds at 80 psi. But having higher capacity tires will not increase the trailer capacity.

expert reply by: Michael H