2020 Specialized Stumpjumper ST 27.5 Mountain Bike

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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 27.5 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

• 27.5 wheels accentuate the Stumpjumper ST's playful on-trail feel.

• 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
FRAME M5 alloy chassis and rear end, asymmetrical design, 27.5 Trail Geometry, threaded BB, fully enclosed internal cable routing, 12x148mm dropouts, sealed cartridge bearing pivots, replaceable derailleur hanger, 130mm of travel
SEAT BINDER Specialized bolt-type, alloy, 38.6mm
REAR SHOCK X-Fusion 02 Pro RL, Rx Trail Tune, rebound adjust, lockout 190x45mm
FORK RockShox Recon RL, Motion Control damper with low-speed compression to lockout, 46mm offset, rebound adjust, 15x110mm Boost™ Maxle® Lite thru-axle, 130mm of travel
STEM Specialized, 3D-forged alloy, 4-bolt, 7-degree rise
HANDLEBARS Specialized Trail, 6061 alloy, 8-degree backsweep, 6-degree upsweep, 27mm rise, 780mm, 31.8mm clamp
GRIPS Specialized Sip Grip, half-waffle, slip-on
SADDLE Body Geometry Myth:155 XS/S, Body Geometry Henge:143 M/L/XL, steel rails
SEATPOST TransX dropper, 34.9mm, XS: 100mm, S: 125mm, ML/XL: 150mm Travel
FRONT BRAKE Tektro Gemini Comp, hydraulic disc, resin pad, 200mm
REAR BRAKE Tektro Gemini Comp, hydraulic disc, resin pad, 180mm
REAR DERAILLEUR SRAM SX Eagle
SHIFT LEVERS SRAM SX Eagle, trigger, 12-speed
CASSETTE SRAM PG-1210 Eagle, 11-50t
CHAIN SRAM SX Eagle, 12-speed
CRANKSET SRAM SX Eagle, Powerspline, 170mm
CHAINRINGS Steel, 32T
BOTTOM BRACKET SRAM Powerspline
RIMS Double-wall alloy, 27mm internal width
FRONT HUB Specialized, sealed cartridge bearings, 15x110mm thru-axle, 32h
REAR HUB Specialized, sealed cartridge bearings, 12x148mm thru-axle, 32h
SPOKES Stainless, 14g
FRONT TIRE Purgatory, GRID casing, GRIPTON® compound, 2Bliss Ready, 27.5 x 2.3"
REAR TIRE Purgatory, GRID casing, GRIPTON® compound, 2Bliss Ready, 27.5 x 2.3"
INNER TUBES Presta, 40mm valve
PEDALS Specialized Dirt

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