328,289 Miles, 18,414 Engine Hours, Mack MP7 Engine, 345 HP, 6 Speed Allison Automatic Transmission, 19FT 7IN/29YD Ox Bodies, 3rd & 4th Steerable Lift Axles, VIN: 1M2AX04C7EM018785, Rear Tire Size: 11R22.5, Steerable Tire Size: 255/70R22.5. I could hear an air bag leak toward the 3rd axle steerable lift tire.