Hi, a buddy have a TT truck with 4,5 x 21" at the front and 6,5 x 20" at the rear.
I asume the front tire pressure is 35 psi as on the person cars, but what are the pressure for the rear tires?
(Have searched the forums with no luck).
I have Prowler 6.50-20 tires on the rear of my TT. They're Load Range D 8 Ply Rating. It says on the tires, "Max Load Single 2470 Lbs at 75 PSI Cold". I run them at 50 PSI.
I can't really give a good reason why I use 50 PSI, but 75 PSI just seems way too hard for my use. Even at the reduced pressure the rear end is as stiff as a board. If anything, I'd like to soften it up a little more.
When I put new Lucas 6.00x20 tires on the back of my TT I called Lucas to see how much pressure to run in them. They recommended 45 psi. I run them at 38 - 40 psi because it does ride hard, as is the nature of a TT. I don't haul much weight on it anyway.
Great question! I like a soft ride and even at 45lbs you can get tossed around. Some guys still use their truck the way it was intended. Maybe someone will give us a max. above the 75lbs but I would worry about the lock rings.
I run mine at 75 +/-
I can't imagine anything would soften the ride on a TT except a heavy load.
The smoothest this thing ever runs/rides is when I have 1000lbs. or more on