RockShox Revelation RCT3 Maxle Lite Tapered Steerer Crown Adjust Solo 140mm Air Fork, Black, 29-Inch With Solo Air you add air to your forks through a single Schrader valve, filling both the positive and negative air spring chambers simultaneously Weight: 26": 1636g, 27.5": 1787g, 29": 1800g, based on 265mm tapered carbon crown-steerer, 9mm QR lower leg Motion Control DNA damping mechanism is lighter than its predecessors while still offering smoother, more consistent damping performance Features printed Air Guides on fork legs Maybe not a technological feat, but it will help you set up your suspension in seconds instead of minutes