Originally Posted by WK2 Rover
BFG didn't want to discuss the math and referred me to the load tables again. Fortunately someone provided a link to them above!
Based on the tables the proper inflation would be 50 PSI. I will try 45 to 50 PSI range until it feels right.
Sent from my iPhone using JeepGarage
I just picked up a set of the BFG TA KO2 LT265/60R18s after my original tires were done. Discount Tire inflated them to 39psi. I've since bumped them up to 41psi, and will slowly raise the pressure until I find the right spot, or may adjust depending on if I'm towing or off-roading.
Not sure how you are getting 50psi for these. Based on the load table provided earlier in the thread (https://www.toyotires.com/tires-101/...flation-tables
), after derating the OEM P-metric, I get 45psi to maintain the same loading (2011 lb), same as the OP of the loading table. I do get 50psi if you don't derate the P-metric (2212 lb before derating).
Note that the front axle gross weight rating is 3200 lb and the rear is 3700 lb. When setting up my trailer, I was very close to the max rear axle rating (slightly heavier when I first load balanced it, but now when the trailer is balanced I'm just over 3600 lb on the rear axle). At 3700 lb on the rear axle or 1850 lb/tire (assuming evenly loaded L/R), you need to be 40+psi (40psi=1865lb/tire, 45psi=2025lb/tire).
I found somewhere online (sorry, don't have the original source) that my diesel 4x4 has a curb weight of 5725 lb, and 54/46 F/R loading ratio empty, or 3092 F/2634 R. So if you are just running around with driver/passenger/minimal load, you could in theory run at a lower pressure.
FYI, more discussion and thermal images of under-inflated LT tires here: https://www.nittotire.com/media/1529...TSD-12-011.pdf