Keystone RV Forums - View Single Post - Max tire pressure or trailer recommended pressure?

diugo · 05-22-2013, 07:59 AM

Hi Jadatis,

Welcome to the forum and thank you for compiling the info and taking the time to post it.

What you point out is something I've always wondered about---how a single pressure/load table can be used to describe four distinctly different tires: Load Range B (LRB), LRC, LRD, and LRE. I've always questioned the apparent equivalence, for example, of an LRD and LRE at 65 psi. Your data confirms my suspicions---published load tables are often woefully inaccurate.

You specifically questioned the Maxxis table, suggesting all the pressures were too low. However, all your data seems to apply to what we here call "LT" (Light Truck) tires---and that table describes "ST" (Special Trailer) tires. A dominant feature of the ST tire is that, due to its different construction, it can support a higher load than an LT tire, both at the same pressure.

05-22-2013, 07:59 AM	#46
diugo Permanent User Ban Join Date: Apr 2013 Location: Imperial Dam LTVA (Yuma, AZ) Posts: 258	Hi Jadatis, Welcome to the forum and thank you for compiling the info and taking the time to post it. What you point out is something I've always wondered about---how a single pressure/load table can be used to describe four distinctly different tires: Load Range B (LRB), LRC, LRD, and LRE. I've always questioned the apparent equivalence, for example, of an LRD and LRE at 65 psi. Your data confirms my suspicions---published load tables are often woefully inaccurate. You specifically questioned the Maxxis table, suggesting all the pressures were too low. However, all your data seems to apply to what we here call "LT" (Light Truck) tires---and that table describes "ST" (Special Trailer) tires. A dominant feature of the ST tire is that, due to its different construction, it can support a higher load than an LT tire, both at the same pressure.