The Niner SIR 2-Star 29" Mountain Bike is designed for MTB enthusiasts looking for a robust, comfortable hardtail ready to tackle technical trails and demanding mountain routes. Its exclusive Reynolds 853 steel frame offers a smooth, precise ride with great shock absorption, combining the strength of steel with modern Trail geometry.
Equipped with a 120mm RockShox Recon Silver fork, SRAM SX Eagle 12-speed drivetrain, and SRAM Level hydraulic disc brakes, it provides the perfect balance of pedaling efficiency, control, and fun on both XC routes and more technical trails.
Main Features
• Reynolds 853 steel frame with modern Trail geometry
• RockShox Recon Silver fork with 120mm travel
• SRAM SX Eagle 12-speed drivetrain
• SRAM SX Eagle DUB cranks with 32-tooth chainring
• SRAM PG-1210 11-50T cassette
• SRAM Level hydraulic disc brakes
• 180mm front and 160mm rear brake rotors
• 29" wheels with Niner Alloy Tubeless Ready rims
• Schwalbe Nobby Nic 29 x 2.4" tires
• Race Face Aeffect R 780mm handlebars
• Race Face Aeffect R stem
• Niner Alloy seatpost
• Niner Custom saddle
Materials
• Frame: Reynolds 853 steel
• Fork: RockShox Recon Silver
• Rims: Niner Alloy Tubeless Ready
• Handlebars: Race Face Aeffect R
• Seatpost: Niner aluminum
Dimensions and Fit
• Wheel size: 29"
• Front suspension travel: 120 mm
• Tires: Schwalbe Nobby Nic 29 x 2.4"
• Handlebars: 780 mm
Safety and Regulations
• Reynolds 853 steel frame provides a comfortable, resistant ride with excellent vibration absorption.
• RockShox Recon Silver fork with 120mm travel improves control and stability on technical terrain.
• SRAM Level hydraulic disc brakes with 180/160mm rotors ensure powerful and precise braking.
• SRAM SX Eagle 12-speed drivetrain with 11-50T cassette to easily tackle any incline.
• Tubeless Ready wheels improve traction, reduce puncture risk, and increase performance in the mountains.
Recommended Use
• Trail
• Cross Country (XC)
• Technical trails
• Mountain routes
• Off-road use