The Heyday! is Salsa&';s most versatile fat bike, designed and engineered to excel in a wide variety of conditions. The 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 1.0 dropouts allow for short chainstays and easily support single speed or geared drivetrain options. The Heyday! can do it all. Designed with a low and rearward center of gravity for increased stability when navigating challenging terrain Bearpaw Aluminum fork with two sets of Three-Pack mounts Aluminum frame includes two bottle mounts inside frame triangle and down tube mounts for a bottle, pump, repair kit, or other accessory Alternator 1.0 dropouts Full-length internal cable housing routing, internal dropper post routing, and 1x or 2x drivetrain compatible Compatible with Salsa Alternator 190 Rear Rack using Salsa Rack-Lock or Post-Lock