Quote Originally Posted by VXorado View Post
Should we be using 29lbs inflation with over-sized tires?
You definitely want to run yours high pressure unless offroad Jon. You have so much sidewall, it would be dangerous to run yours low pressure at highway speeds.

Im with tom on this one, (wow thats hard to say) the tire pressure on the door jam is designed for the factory tires and doesn't compensate for mods or new tire technologies. I know it sounds nuts, but i run my tires at 55psi, and get 3-4 more mpgs out of em and ride quality is all in the shocks and springs. If your VX rides that bad I'd look into the heavy duty torsion bars.

Quote Originally Posted by tom4bren View Post
I don't care what the techies say. I alwmodsays have & I always will inflate my tires to the TIRE mfr recommended pressure rather than what is on the doorjam of the vehicle. Think about it. The VX is 10+ years old. Do you really think that Isuzu had a crystal ball back then to KNOW what innovations/improvements would be made to tire technology over the course of the next decade??? Look at all of the variety of tires out there: MT/AT/street, 6/8/10 ply, directional versus not, speed ratings, life ratings, temperature ratings. How can one recommended tire pressure work for all???

That said: it's just a starting point for me. I adjust the tire pressure to maximize life of the tire. Our MPG sux anyway so tire pressure really isn't gonna make that much of a difference. Maybe I'm a numb butt, but I really don't notice any difference in ride quality based on tire pressure anyway (especially with the VX ride quality - or lack thereof). With a 100 mile commute daily, it's all about making the expendables on a vehicle last as long as possible.

IMHO

That's my $.02 ... & I want change.