Convert ST tires to LT tires

Red wing wrote:
Hi everyone

How do you convert ST tires size to LT tires size? For example 235/80R/16 load range E to a light truck tire size.

Unfortunately almost all of the ST tires have unique size and load capacity specifications. Unlike automotive tires, RV trailer tires - any design - do not have T&RA replacement recommendation charts. So, solicited recommendations will be heavily biased with brand names and unacceptable sizes..

When we do find a valid comparison in size with another tire design we see the vast differences between tire designs/specifications.

The ST235/85R16E has an average diameter of 31.7" on 6.0" wide rims. It will have a tread depth of 10/32". It's maximum load capacity at 80 psi is 3640#.

The LT235/85R16E has an average diameter (on 6.5" wide rims) of 32". It's normal tread depth is 15/32". It's Maximum load capacity at 80 psi is 3042#.

The ST235/80R16E has no acceptable size or load capacity replacement. You should ask your trailer's manufacturer or the tire's manufacturer about replacement recommendations. That's what your owner's manual will recommend.

Because your certification label only depicts the tire size and load range, any of the load ranges - 3420 - 3500 - 3520 - become acceptable replacements.

FastEagle