Maxxis Ue-168
I've been interested in the Maxxis UE-168 as a LT replacement for the 14" ST tires that came with my trailer. The original tires were Trail America ST 205/75R14. After one year I upgraded to the Max...
Forum Discussion
Last Fall I garbage picked a couple of 1980's 20" dump truck tires on wheels. I wanted the wheels to make camp fire rings.
The tires were before the federal mandated labeling on the side walls. The tires were only marked "load range E". The rear tire was marked load range E for the D position. Both the front tire and rear tire were Kelly Springfield nylon tires.
I tried to dismount the tires, but I couldn't break the beads, so I decided to cut the tires off the wheels with a razor knife. After the tires were off I used an abrasive wheel to cut the bead to remove it.
The front steering axle tire was completely different design than the rear tire. Both tires were the same weight rating, E. Both tires have the same number of cords. The rear D tire had larger cords with thicker rubber between them. The rear D tire was almost twice as thick as the front tire.
I believe that this D position tire is the same practice as today's ST tires. I think that the thicker rubber is to dissipate heat between the nylon cords. The front tire was the standard LT construction. This heavy duty construction has been an industry standard for more the 35 years. There has to be a reason why they are invested in a more costly design? The heavy duty design is stronger, but more susceptible to generating heat when run at low pressure or over loaded. The thicker rubber between the cords creates more heat when flexed at low pressure or overloaded.
The reason the tire had a D position rating is because it was designed to run as a dual rear wheel. Dual wheel tires are derated 10% because the outer wheel applies force on the inner wheel due to the camber of the road. This is why they need a stronger tire that can flex in the D position. I believe the same theory applies to ST tires on RV's we need a strong tire that can flex.
MM49
The tires were before the federal mandated labeling on the side walls. The tires were only marked "load range E". The rear tire was marked load range E for the D position. Both the front tire and rear tire were Kelly Springfield nylon tires.
I tried to dismount the tires, but I couldn't break the beads, so I decided to cut the tires off the wheels with a razor knife. After the tires were off I used an abrasive wheel to cut the bead to remove it.
The front steering axle tire was completely different design than the rear tire. Both tires were the same weight rating, E. Both tires have the same number of cords. The rear D tire had larger cords with thicker rubber between them. The rear D tire was almost twice as thick as the front tire.
I believe that this D position tire is the same practice as today's ST tires. I think that the thicker rubber is to dissipate heat between the nylon cords. The front tire was the standard LT construction. This heavy duty construction has been an industry standard for more the 35 years. There has to be a reason why they are invested in a more costly design? The heavy duty design is stronger, but more susceptible to generating heat when run at low pressure or over loaded. The thicker rubber between the cords creates more heat when flexed at low pressure or overloaded.
The reason the tire had a D position rating is because it was designed to run as a dual rear wheel. Dual wheel tires are derated 10% because the outer wheel applies force on the inner wheel due to the camber of the road. This is why they need a stronger tire that can flex in the D position. I believe the same theory applies to ST tires on RV's we need a strong tire that can flex.
MM49
