Features Flight Attendant, uses an algorithm with a suite of sensors to read rider and terrain inputs to anticipate the perfect suspension position 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