Originally Posted by DUB Offroad Edition
i got goodyear wrangler at/s 20"wheels 34" tires.it says max pressure 80 and the load rating is load "E" but my 2 front ones have 51.5 and pass rear is 48 and driverside rear is 51 should i add more air in?? to what pressure? iam getting really crappy mileage and never thought it would be tires
Probably some of your crappy mileage problem is the amount of rotating mass and resistance you get from having those huge wheels and tires on that truck not to mention if you havent re-calibrated your speedo for the tires and wheels you wont get an accurate reading anyway. All that extra wheel and tire weight will really kill mileage and power not to mention make it harder for the brakes to stop the truck. I have 32x11.50x15 BFG A/Ts on my truck and I run 34-36 PSI in all the tires. Factory 31x10.50x15 BFGs had a door tag reading of 30 psi but the tires sagged quite a bit and wore the outsides of the tires a bit so I pushed them up as well. When the tire shop put my new 32s on they pumped them to 44psi till I pitched a fit because the way it was gonna ride.