Rock Shox SID Ultimate Race Day 2P 29" Fork The best of what XC can be For those of you who crave the excitement of race day, but who live for the ride, your XC fork has arrived. The Rock Shox SID Ultimate Fork features a new 35mm chassis that provides extra rigidity during high-speed descents, without compromising the expert climbing prowess that has made the SID famous. The 2-position Charger(TM) Race Day Damper is the lightest damper Rock Shox has ever made and features Open and Full-Lock modes for quick pedal mode adjustments. The Debon Air+ spring offers buttery-smooth small bump compliance, support throughout the fork's travel, and is compatible with Bottomless Tokens for even more customization. All of this performance is combined with a new machined crown for reduced weight, and an overall weight of only 1480 grams. This Rock Shox SID Ultimate is leading the way for what a modern XC fork should be. Features Updated 35mm chassis increases stiffness and rigidity without adding additional weight Charger(TM) Race Day 2 damper the lightest damper Rock Shox has ever made, with Open and Full-Lock modes Debon Air+ air spring provides supple small bump compliance, better mid-stroke support, and a higher ride height Maxima Plush suspension fluid for smoother operation and increased longevity New machined crown shaves weight without sacrificing integrity or stiffness Overlapping bushing package smooths out the ride SPECIFICATIONSTravel110 or 120mm Lockout Yes Axle Type15x110mm BOOST(TM)Steer Tube Diameter1. 5" Tapered Stanchion Diameter35mm Wheel Size29"Spring Debon Air+Damper Charger(TM) Race Day 2PBrake Compatibility Post mount Max Rotor Size220mm Min Rotor Size180mm Intended Use Cross-Country Weight1480 grams (120mm travel with Crown Adjust and Maxle Stealth)e-Bike Approved Not Approved | Sram | Rockshox Sid Ultimate Race Day 2P 29" Fork Rmt 29 Sb 120 | Red | 44