The GMC Yukon Fat Bike is designed around a hand crafted, lightweight aluminum frame. Featuring 26” x 4” wide tires on 4” wide aluminum rims, the Yukon feels at home on the snow or on the dirt. A Shimano Revo 7 speed shifter, Tourney rear derailleur and a wide range Shimano 14-34 cassette give you plenty of gear options no matter how steep your trails are. Fits riders 5’6” to 6’.