The Heyday! C is Salsa’s most versatile fat bike, designed and engineered to excel in a wide variety of conditions. The carbon fiber frame utilizes 197 mm rear spacing to accommodate up to 5" tires, and the 100 mm threaded bottom bracket allows a wide range of crank (Q-factor) choices. Alternator 2.0 dropouts allow for short chainstays and easily support multiple drivetrain options. Heyday! C can do it all.