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Stumpjumper ST Alloy 29

2020 Stumpjumper ST Alloy 29

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 ULTIMATE TRAIL BIKE

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.

PERFECTLY-BALANCED SUSPENSION

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.

SMART PARTS PICK

• 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.

Technical Specifications

* Weights based on production painted frames as pictured. Actual weights will vary based on colorway, frame size, and component variation. Specifications are subject to change without notice.

Technical Specifications coming soon

Geometry

SMLXL
Crank Length170mm170mm170mm170mm
Handlebar Width780mm780mm780mm780mm
Stem Length50mm50mm50mm50mm
Saddle Width155mm143mm143mm143mm
Seatpost Length406mm456mm456mm456mm
Stack619mm619mm642mm656mm
Reach405mm425mm445mm470mm
Head Tube Length100mm100mm125mm140mm
Head Tube Angle66.5°66.5°66.5°66.5°
BB Height341mm341mm341mm341mm
BB Drop33mm33mm33mm33mm
Trail107mm107mm107mm107mm
Fork Length, Full560mm560mm560mm560mm
Fork Rake/Offset51mm51mm51mm51mm
Front Center716mm736mm766mm797mm
Chainstay Length437mm437mm437mm437mm
Wheelbase1151mm1171mm1201mm1232mm
Top Tube Length, Horizontal573mm597mm628mm662mm
Bike Standover Height756mm762mm775mm776mm
Seat Tube Length380mm410mm455mm505mm
Seat Tube Angle74.8°74.5°74.1°73.7°
Geometry

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