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The Specialized Stumpjumper Comp Alloy 29er 12 Speed Mountain Bike is no longer available, although you may find similar or newer versions below.

 

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Specialized Stumpjumper Comp Alloy 29er 12 Speed Mountain Bike  2020
  • 75785
 
No need to fret—we haven’t forgotten about all you alloy fans out there. In fact the new Stumpjumper Comp Alloy 29 with 12-speed SRAM NX Eagle may be the most radically designed alloy bike ever made. For real though. And with new tube shapes and an asymmetrical design it's going to exceed all of your expectations of how a trail bike should ride.
Cyclestore.co.uk carries the full range of Specialized bikes and accessories. To find out more about Specialized bikes and accessories, go to the Specialized Bikes homepage.

No need to fret—we haven’t forgotten about all you alloy fans out there. In fact the new Stumpjumper Comp Alloy 29 with 12-speed SRAM NX Eagle may be the most radically designed alloy bike ever made. For real though. And with new tube shapes and an asymmetrical design its going to exceed all of your expectations of how a trail bike should ride.

Our design goal for the new Stumpjumper was simple—build the ultimate trail bike one that feels telepathic. And it turns out that this feeling all comes down to stiffness. Think of it this way: when the frames telling your hands one thing and your feet another your brain gets confused with the imbalance and the bike feels unstable. In order to fix this we had to get to work on dialing-in the material and shapes.

We continued down the suspension path with a custom Rx Trail Tune on both the fork and rear shock. Suspension performance is highly dependent on frame wheel and rider size so we use our Rx Tune to get each bike to land in the middle of the adjustment spectrum and this gives you the biggest possible range to fine-tune your ride. Another focal point of the tune was matching the suspension characteristics between wheel sizes—we developed a specific Rx Tune for each platform. So no matter what wheel size you prefer you’ll get perfectly linear suspension.

Steps were also taken to make this bike easy to live with. Threaded bottom brackets make a triumphant return and we made room for up to a 3.0 tyre. Youre also free to run whatever aftermarket rear shock you want since were using standard metric shocks. And customization is furthered with a Flip Chip that lets you to dial-in your Stumpy to your riding style. Switch it from High to Low and it drops your bottom bracket 6mm and slackens the head tube by half-a-degree. Little details also jump out to surprise you like a newly designed ribbed chainstay protector that makes chain slap a thing of the past and nearly silences the drivetrain.

The build on this Comp model comes with a list of components that deliver undeniable quality like a 12-speed SRAM NX Eagle drivetrain SRAM Guide R disc brakes FOX front and rear suspension and Roval Traverse 29 wheels.

    • The completely redesigned alloy Stumpjumper frame features an M5 alloy front- and rear-end an asymmetrical design and our 29 Trail Geometry so its just the right amount of both capable and comfortable.
    • The FOX DPS Performance rear shock features our Rx Trail Tune ensuring that no matter the wheel or frame size your bike is dialed-in perfectly.
    • SRAMs 12-speed NX Eagle groupset features a wide gear range that delivers climbing and descending efficiency in spades.
 
 
Frame
M5 alloy chassis and rear end, asymmetrical design, 29 Trail Geometry, threaded BB, fully enclosed internal cable routing, 12x148mm dropouts, sealed cartridge bearing pivots, replaceable derailleur hanger, 140mm of travel
Fork
FOX FLOAT Rhythm 34, GRIP Damper, 51mm offset, 2-position sweep adjust, 15x110mm, tapered alloy steerer, 150mm of travel
Rear Shock
FOX FLOAT DPS Performance, Rx Trail Tune, rebound and 3-position compression adjust, 210x50mm
Front Hub
Specialized, sealed cartridge bearings, 15x110mm spacing, 28h
Rear Hub
Specialized, sealed cartridge bearings, 12x148mm thru-axle, 28h
Spokes
DT Swiss Industry
Rims
Roval Traverse 29, hookless alloy, 30mm inner width, tubeless ready
Inner Tubes
Standard, Presta valve
Front Tyre
Butcher, GRID casing, GRIPTON® compound, 2Bliss Ready, 29x2.6
Rear Tyre
Purgatory, GRID casing, GRIPTON® compound, 2Bliss ready, 29 x2.6
Crankset
SRAM NX Eagle, DUB, 170mm
Chainrings
Steel, 30T
Bottom Bracket
SRAM DUB, threaded BB
Shifters
Sram NX Eagle, trigger, 12-speed
Rear Derailleur
SRAM NX Eagle, 12-speed
Cassette
SRAM NX Eagle, 12-speed, 11-50t
Chain
SRAM NX Eagle, 12-speed
Front Brake
SRAM Guide R, hydraulic disc, organic pads, Guide S4 4-piston caliper, 200mm
Rear Brake
SRAM Guide R, hydraulic disc, organic pads, Guide S4 4-piston caliper, 180mm
Handlebars
Specialized Trail, 6061 alloy, 8-degree backsweep, 6-degree upsweep, 27mm rise, 780mm, 31.8mm clamp
Grips
Specialized Sip Grip, half-waffle, S/M: regular thickness, L/XL: XL thickness
Stem
Specialized Trail, 3D-forged alloy, 4-bolt, 6-degree rise
Saddle
Body Geometry Phenom Comp, Adaptive Edge design, hollow Cr-Mo rails, 143mm
Seatpost
X-Fusion Manic, infinite adjustable, two-bolt head, bottom mount cable routing, remote SRL LE lever, 34.9mm, S: 125mm, M/L/XL: 150mm of travel
Seat Binder
Alloy, 38.6mm
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