2021 SPECIALIZED STUMPJUMPER ALLOY MOUNTAIN BIKE
The Specialized Stumpjumper Alloy Mountain Bike offers an entry-level price without entry-level performance. This no-nonsense model provides progressive geometry with refreshed suspension kinematics to make it the best performing Stumpjumper yet. Designed to perform on a wide range of trails, the Stumpjumper Alloy features a lightweight frame design that does not sacrifice stiffness. With a light and lively ride character, the new Stumpjumper aims to elevate your riding to new heights, whether you are a seasoned veteran, or taking your first steps in the sport.

With 130mm of trail-hungry travel, the Stumpjumper alloy hits the sweet-spot for riders looking to boost their trail-centre game. The product of thousands of lab and field testing hours, Specialized have made this latest revision into the fastest so far. Short on travel but not short on fun, the Stumpjumper packs a punch when it comes to explosive climbing performance, with improved pedalling characteristics meaning you will leave your friends for dust on the way to the trail-head. What goes up must come down, the latest changes are keen to take on any challenge, ensuring you never feel out of pocket when it is time to descend.

SRAM’s SX drivetrain offers 12-speed performance on a budget, with trickle-down technology seeing high-end features found on the GX and NX lines filtering down. A truly contemporary ride, the Stumpjumper Alloy features a TransX dropper post to retain flow on mixed gradient trails, and RockShox’s 35 Silver fork provides stout tracking and a silky smooth 140mm of travel. 29" wheels with sealed cartridge bearings offer excellent rolling capabilities on rough terrain, reducing hang up through ruts and bumps.

FEATURES :
• 29" aluminium frameset with asymmetrical design
• Redesigned suspension kinematics for improved on-trail performance
• Horst pivot BB adjustment
• 130mm of trail-hungry travel
• RockShox 35 Silver fork and X-Fusion O2 rear shock with lockout
• SRAM SX 12-speed groupset with Tektro Gemini brakes
• Rider-First Engineered™ sizing

SPECIFICATION :
Frame
Alloy chassis and rear-end, asymmetrical design, 29 Trail Geometry, horst pivot BB adjustment, threaded BB, 12x148mm dropouts, sealed cartridge bearing pivots, replaceable derailleur hanger, 130mm of travel
Seat Binder
Alloy, 38.6
Rear Shock
X-Fusion 02 Pro RL, Rx Trail Tune, rebound adjust, lockout S1:190x42.5mm, S2-S6: 190x45mm
Fork
RockShox 35 Silver, Solo Air, 44mm offset, rebound adjust, TurnKey lockout, 15x110mm Boost™ Maxle® Lite thru-axle, 140mm of travel
Stem
Alloy Trail Stem, 35mm bar bore
Handlebars
Specialized, 6061 alloy, 6-degree upsweep, 8-degree backsweep, 30mm rise, 800mm width
Saddle
Body Geometry Bridge Saddle, steel rails
Seatpost
TranzX dropper, 34.9mm, XS-S: 100mm, M: 120mm, L/XL: 150mm Travel
Tape
Specialized Trail Grips
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, 12-speed
Shift Levers
SRAM SX Eagle, trigger, 12-speed
Chain
SRAM SX Eagle, 12-speed
Crankset
SRAM SX Eagle, DUB, S1:165mm, S2-S5: 170mm, S6: 175mm
Chainrings
Steel, 30T
Bottom Bracket
SRAM Powerspline
Rims
700c disc, double-wall alloy, sleeved, 32h
Front Hub
Alloy, sealed cartridge bearings, 15x110mm thru-axle, 28h
Rear Hub
Alloy, sealed cartridge bearings, 12x148mm thru-axle, 28h
Front Tire
Butcher, GRID casing, GRIPTON® compound, 29x2.3"
Rear Tire
Purgatory, GRID Casing, GRIPTON® compound, 29x2.3"
Inner Tubes
Standard, Presta valve