RST F1RST 29″ Boost Air Fork 1.5″ – 1 1/8″ Tapered Steerer 255mm – 15 x 110mm Axle
Engineered for demanding MTB riders, the RST F1RST 29″ Boost Air Fork delivers trail-ready suspension performance thats built to take on tough terrain. Featuring a responsive AIR3 spring and BO-TNL damper with remote lock-out, this fork offers precision control and efficient shock absorption on everything from technical rock gardens to high-speed descents. The 32mm stanchions, magnesium lower blades and an aluminium crown combine to provide the perfect balance of durability and weight, while the Boost axle spacing ensures confident, stable handling.
Whether you’re upgrading your XC or trail setup, this fork provides premium performance with all the key features youd expect at a seriously competitive price.

• Fits tyres up to 2.6″ (29+”)
• Stanchion width: 32mm
• For BOOST HUB (110mm)
• Fork offset: 51mm
• Lower leg material: Magnesium
• Crown: Aluminium
• Crown Race Size:39.8mm
• Damper:BO-TNL Compress adjust Rebound adjust remote lock-out
• Mudguard mounts: Yes
• Max rotor: 220mm (with adapter)
• Brake type: Post Mount Disc (74mm)
• Travel: 100mm
• O.L.D Axle: 15 x 110mm (Supplied)
• Steerer: 1 1/8 – 1.5″ Tapered
• Steerer length: 255mm
• Axle to Crown: 525mm
• Matt Black Finish
• Weight: 2250g (fork and lockout)