ST145/80-12 Tire Recommendation Over a 4.80-12

Updated 04/26/2016 | Published 04/23/2016

Products Featured in This Question

Kenda 215/60-8 Bias Trailer Tire with 8" White Wheel - 5 on 4-1/2 - Load Range C

(7486)

$78.91

Kenda Karrier S-Trail ST145/R12 Radial Trailer Tire - Load Range E

(561)

$73.57

Question:

on the bias tire 4.80 x 12 compared ST tire 145 / R -12 radial ,what is the difference in the numbers

asked by: Pete

Expert Reply:

The two tire sizes are similar, but the 145/80-12 will be a bit taller at 21.3 inches vs. the 4.80-12 which has a diameter of 20.5 inches. Aside from that they are very similar and both fit 12 inch diameter rims that are 4 inches wide.

The radial part # AM10140 that is a ST145/80R12 would be what I recommend as it would have plenty of capacity and is a radial which is preferred over bias-ply construction like what all of the 4.80-12 tires are made of.

A radial tire flexes more than a bias tire, giving it better ground contact, traction, stability, and tread wear.

A radial tire will normally run cooler than a bias ply tire, especially when the tire is under a load. A tire that runs cooler will last longer.

expert reply by: Jameson C