AMP Terrain Attack M/T 285/55R20LT285 55R20 AMP MUD TERRAIN ATTACK MT A MUD TERRAIN 2855520 TIRES Brand: AMP Model: Mud Terrain Attack MT A Size: LT285 55R20 Part#: 285 5520AMP CM2 Aspect Ratio: 55 Inflated Diameter: 32. 3 Inflated Width: 11. 2 Load Index: 122 Load Rating: E Load Range: 3305 LBS Max Load Max Psi: 80 Ply: 10 Revs Per Mile: 733 Section Width: 285 Service Description: 122Q Sidewall: Black Speed Rating: Q Tire Rim Diameter: 20 Tire Type: Mud Terrain Tread Depth: 19