(Used) 2006 Mack CXN613, TANDEM CUTOFF- Make: Meritor, Model: RD-20-145, Ratio: 3.73, Hub Bolts: 10, Brake Type: Air Wedge, Suspension: Maxlite 40EZ For more information about this item, give us a call. We ship Worldwide! (CRG HEAVY TRUCK PARTS) 929 W PULASKI HWY ELKTON, MD 21921