[quote=leeboweffect]I'm changing from bias ply to radial, but staying 4.80 X 12. Read down, the radial is C rated for load and to 81mph for speed. I've never had a blow out on my trailers and don't want to. Somehow the bias plys (most only rated to 55mph) have held up over the years but I replace them about every two years whether they look bad or not. The scariest thing about running old tires (more than 5 years old) is if the sidewalls have cracks in them, if so they're dry rotted , very unsafe and can blow anytime. Dry rot is much accelerated if your rig sits on the ground instead of pavement or concrete and doesn't move often.
The other thing about these tires that I've discovered is that if you run them at max. pressure they wear out in the center very quickly so I have generally run Bs at 40psig and Cs at 50 psig. Yes I know that all the tire folks will tell you to run them at max but...
[url]https://www.etrailer.com/Tires-and-Wheels/Taskmaster/TT48012C.html[/url][/quote]
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