1985 Mack 11KHA, Truck Tractor, Complete Axle-Front Rears, Fits to: Mack RS686LST, (Used) 1985 Mack RS686LST, COMPLETE FRONT REAR TANDEM- Part Number: 11KHA5312P15, Make: Mack, Model: 11KHA, Ratio: 3.87, Capacity: 17,000 lbs, Hub Bolts: 8, Brake Type: Drum, For more information about this item, give us a call. We ship Worldwide! (CRG HEAVY TRUCK PARTS) 929 W PULASKI HWY ELKTON, MD 21921, Ratio 3.87, Serial# TBD, Truck Year 1985 1M2T153Y4FM002646