Features the Charger 3.1 RC2 damper that offers a wider tunable range of adjustments for the perfect suspension action Increased damping range and high speed compression, low speed compression, and low speed rebound adjustments 35mm chassis designed for allmountain riding. Stiff, efficient, and designed to be as light as possible Equipped with ButterCups that dampen highfrequency vibrations before they hit the riders hands DebonAir+ air spring is built to strike the perfect balance between butterlike small bump feel with increased air volume for rider support throughout the travel 180mm minimum/220mm maximum rotor size, 81mm maximum tire width EBike approved