FORK RST 29 FIRST 120mm 1.5-1-1/8 15mmTHRU BK DISC Lightweight XC workhorse at an affordable price. Fully adjustable hydraulic compression damping with lock-out, as well as externally adjustable rebound. An air spring is used to achieve maximum performance as well as saving weight over using a steel coil spring. Uses in-leg XC optimized OCR damping system which has external compression adjustment w/ lock-out and rebound adjustments. Adjustable travel from 80 - 120mm. Post disc brake mount only - 180mm max rotor size. Item Specifications: Material: Aluminum/Magnesium, Size: 29`, Color: Black, Brake Mount Type: Post Disc, Steerer Type: Threadless, Steerer Size: 1-1/8 to 1.5`, Type: Suspension, Race Diameter: 39.8mm, Axle: 15TA, Steerer Length: 255mm, O.L.D.: 100mm, Travel: 120mm, Rake: 51mm, Axle-to-Crown: 530mm,