[fcatwo]

This is probably worth a call to the factory. 65psi may be better for the tires but will transmit a lot more pounding to your TM. TMs are fairly complex and somewhat fragile and the less beating we give them the better. IMO the same goes for upgrading the suspension on the smaller units to 5000lbs unless you intend to load them near or over the stock 3500lb suspension capacity. More is not always better IMO.