The Stumpjumper ST Alloy 27.5 is back and better than ever. This model brings snappy and nimble movements to a whole new dimension whilst maintaining a versatile feel to keep your comfort optimised throughout your trail journey, great for any rider looking for efficiency combined with capability. When riding, you have total control thanks to the innovative sidearm frame design, allowing you to experience lighter and better-handling whilst on the go. By using Specialized's SX Eagle 12-speed drivetrain, you experience single-ring simplicity with an 11-50T cassette, giving you the gearing you need to conquer the biggest climbs. The Stumpjumper is perfect for any rider looking to have fast and agile handling with the addition of the TranzX dropper seatpost to increase your manoeuvrability. So get ready to rip up the trail with a bike that's ready to rumble.
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, Specialized increased both stiffness and performance over bumps, giving you total control.
Specialized's in-house suspension-tuning team develops custom shock tunes, perfectly paired to each bike's kinematics. Specialize 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. Also designed with 130-millimeters of suspension, courtesy of a RockShox Recon RL fork. Finally, SX Eagle 12-speed drivetrain gives you single-ring simplicity and gearing to spare.
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
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
Rear Shock - X-Fusion 02 Pro RL, Rx Trail Tune, rebound adjust, lockout 190x45mm
Chain - SRAM SX Eagle, 12-speed
Bottom Bracket - SRAM Powerspline
Crankset - SRAM SX Eagle, Powerspline, 170mm
Shift Levers - SRAM SX Eagle, trigger, 12-speed
Cassette - SRAM PG-1210 Eagle, 11-50t
Chainrings - Steel, 32T
Rear Derailleur - SRAM SX Eagle
Front Hub - Specialized, sealed cartridge bearings, 15x110mm thru-axle, 32h
Rear Hub - Specialized, sealed cartridge bearings, 12x148mm thru-axle, 28h
Spokes - Stainless, 14g
Rims - Double-wall alloy, 27mm internal width
Front Tyre - Purgatory, GRID casing, GRIPTON® compound, 2Bliss Ready, 27.5 x 2.3"
Rear Tyre - Purgatory, GRID casing, GRIPTON® compound, 2Bliss ready, 27.5x2.3"
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
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
Front Brake - Tektro Gemini Comp, hydraulic disc, resin pad, 200mm
Rear Brake - Tektro Gemini Comp, hydraulic disc, resin pad, 180mm