1997 Meritor/Rockwell RT20145, Truck Tractor, Tandem Cutoffs, Fits to: Western Star 4900E, (Used) 1997 Western Star 4900E, TANDEM CUTOFF, Make: Meritor, Model: RT20145, Ratio: 3.73, Hub bolts: 10, Brake type: air, Suspension type: z spring with air bag, For more information about this item, give us a call. We ship Worldwide! (CRG HEAVY TRUCK PARTS), Ratio 3.73, Serial# Other, Casting# Other 2WKEDDCJ8VK947770