check the tire. it will say on the tire. mine say max 35 but i run my at 33 because they increase when driving and they wear perfect at 33. at 35 i was wearing them fast in the middle. The tires was bulging in the middle.

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-1995 ford ranger prerunner, 4.0, 4x4, 5-speed, 62k original miles, 2.5 radflo bypass front and 2.5 radflo triple bypass rear, deavers f23, 4.56 gears front and back, 07 seats, 07 mirrors, 35x12.50 bfg a/t, 4" fiberwerk glass front and rear, eagle alloy rims, 6k hid heads, two 8k hid off road lights, 34" led light bar, bed/roll cage/engine cage, 25 gallon fuel cell, cut and extended beams/radius arms
-2000 ford SVT f150 lightning -SOLD Lifted 2001 Ford Ranger EDGE, April's 2012 TOTM