Rear Axle Assembly - Centered Pinion - 10 in Ring Gear - 4.86 Ratio - 60 in Wide - Thermal Coated - Magnesium - Each Brand-WINTERS MPN 5063-UMP-MOD-60-C . **NOTE: WIN QUICKCHANGE WITH 2.5 GN SNOUTS & STEEL TUBES. WIDTH = 60 CENTERED. RING & PINION = 4.86. AXLES = 30.5 & 30.5 - SOLD SEPARATELY. OPTIONS = 5063-UMP-MOD...REAR END ASSEMBLY. 8131...MACHINED STEEL TUBES. 8133-10-6...SPRINT CENTER 6-BOLT. 8186P...6-RIB BELL. 8208...THERMAL COATING Truck Freight NO