The Mukluk is Salsa's most versatile fat bike, designed and engineered to excel in a wide variety of conditions. The frame utilizes 197mm rear spacing to accommodate up to 5" tires, and the 100mm threaded bottom bracket allows a wide range of crank (Q-factor) choices. Alternator 1.0 dropouts allow for short chainstays and easily support single speed or geared drivetrain options. The Mukluk can do it all.