Different recommendations for tire pressure.

1. Dealer says 30f, 40r
2. Side door panel says 30f, 46r
3. Manual says 30f, 38r

I have an '03 disco, just put new tires (Cooper). No off-roading, city and highway driving. I live just north of Boston. I also tow the '03 behind my motorhome when it gets warmer here in the NE.

So, what's the correct tire pressure given my driving conditions?

 

One more thing to consider is load range of the tires.

My Rover has some Load Range "E" tires on it - so the tires are quite sloppy at 40psi, and have a max pressure of 80psi... I find 60 in the front and 50 in the back makes it handle very well and not be too harsh on our New England roads.

You obviously want it to make full contact patch with the entire tread. Over pressure will make it wear the center, underpressure will make it wear the sides of the tread easier.

Just my 2c.

Dave

 

another Boston Boy, Consensus seem to be 40 & 40 for milage and wear. It does stiffen the ride a little.

 

For on road driving the required tire pressure is dependent on the load per tire and the specific tire in question. Too high and you get bad tread wear, less traction and increased chance of hydroplaning. Too low and you get bad tread wear and decreased mpg. Way too low and you get Ford Exploder Syndrome.

The most reliable way to determine the right pressure is by checking the contact patch at various pressures. The tire mfg is the next most reliable source of correct pressure. The least reliable is asking on a forum what pressure people run.

 

I run 32F and 38R, I think that's what my manual says.

 

I have run 40 and 40 for 10 years in my 10 ply 265/75/16's and have never had a tire wear issue or harsh ride. If you stay up in the area, you will get slightly better gas mileage which we can all use.