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Our Stumpjumper ST models are snappy and nimble, yet Incredibly versatile—the perfect rigs for riders seeking both efficiency and capability. The Stumpjumper ST Alloy 29 makes that winning combo affordable, with components that are big on performance and small on dollar signs.
The innovative sidearm frame design makes a lighter, better-handling bike. By directly connecting all three mounting points of the rear-end and shock to the frame, we’ve increased both stiffness and performance over bumps. End result? Total control.
Our in-house suspension-tuning team develops custom shock tunes, perfectly paired to each bike’s kinematics. We call this Rx Tune and while it’s not the easy way to build a suspension bike, it’s worth it. You feel Rx Tune as perfectly-balanced suspension.
- 29er wheels roll over obstacles and maintain your momentum with ease.
- 130-millimeters of suspension courtesy of a RockShox Recon RL fork.
- SX Eagle 12-speed drivetrain gives you single-ring simplicity and gearing to spare.
FRAME - M5 alloy frame, asymmetrical design, 29 Trail Geometry, threaded BB, fully enclosed internal cable routing, 12x148mm dropouts, sealed cartridge bearing pivots, replaceable derailleur hanger, 120mm of travel
REAR SHOCK - X-Fusion 02 Pro RL, Rx Trail Tune, rebound adjust, lockout 190x42.5mm
FORK - RockShox Recon RL, Motion Control damper with low-speed compression to lockout, 51mm offset, rebound adjust, 15x110mm Boost™ Maxle® Lite thru-axle, 130mm of travel
FRONT WHEEL – Specialized sealed cartridge 15x110mm hub w/ double wall 27.5 32H rim
REAR WHEEL – Specialized sealed cartridge 12x148mm hub w/ double wall 27.5 32H rim
FRONT TIRE – Eliminator, GRID TRAIL casing, GRIPTON® compound, 2Bliss Ready, 29x2.3"
REAR TIRE – Purgatory, GRID casing, 2Bliss Ready, 27.5 x 2.3"
CRANKSET - SRAM SX Eagle, Powrespline, 170mm
CHAINRING - 32T
REAR DERAILLEUR - SRAM SX Eagle, 12-speed
SHIFT LEVER - Sram SX Eagle, trigger, 12-speed
CASSETTE - SRAM PG-1210 Eagle, 11-50T, 12-speed
FRONT BRAKE - Tektro Gemini Comp, hydraulic disc, resin pad, 200mm
REAR BRAKE - Tektro Gemini Comp, hydraulic disc, resin pad, 180mm
SEATPOST - TransX dropper, 34.9mm, XS: 100mm, S: 125mm, ML/XL: 150mm Travel
SADDLE –Body Geometry Myth:155 XS/S, Body Geometry Henge:143 M/L/XL, steel rails
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Review STUMPJUMPER ST 29 - 2020