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Men's Stumpjumper Comp Alloy 29

2018 Men's Stumpjumper Comp Alloy 29

No need to fret—we haven't forgotten about all you alloy fans out there. In fact, the new Stumpjumper Comp Alloy 29 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.

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 frame's 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 2.6" tire. You're also free to run whatever aftermarket rear shock you want, since we're 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 here is no-nonsense with a focus on dependable, high-performing parts, like a Shimano SLX drivetrain with RaceFace cranks, Shimano SLX disc brakes, FOX front and rear suspension, and Roval Traverse 29 alloy wheels.

Technical Specifications

COCKPIT

Saddle

Body Geometry Phenom Comp, Adaptive Edge design, hollow Cr-Mo rails, 143mm

Stem

Specialized Trail, 3D-forged alloy, 4-bolt, 6-degree rise

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

Grips

Specialized Sip grip, half-waffle, S/M: regular thickness, L/XL: XL thickness

Handlebars

Specialized Trail, 6061 alloy, 8-degree backsweep, 6-degree upsweep, 27mm rise, 31.8mm clamp, S 720mm, M-XL 750mm

WHEELS

Front Hub

Specialized, sealed cartridge bearings, 15x110mm spacing, 28h

Spokes

DT Swiss Industry, stainless, 3-cross, 2.0"

Front Tire

Butcher, GRID casing, GRIPTON® compound, 2Bliss Ready, 29x2.6"

Rims

Roval Traverse 29, hookless alloy, 29mm inner width, tubeless ready

Inner Tubes

Standard, Presta valve

Rear Tire

Purgatory, GRID casing, GRIPTON® compound, 2Bliss ready, 29 x2.6"

Rear Hub

Specialized, sealed cartridge bearings, 12x148mm thru-axle, 28h

BRAKES

Front Brake

Shimano SLX, hydraulic disc, resin pads, 200mm

Rear Brake

Shimano SLX, hydraulic disc, resin pads, 180mm

Suspension

Rear Shock

FOX FLOAT DPS Performance, Rx Trail Tune, rebound and 3-position compression adjust, 210x50mm

Fork

FOX FLOAT Rhythm 34, GRIP Damper, 51mm offset, 2-position sweep adjust, 15x110mm, tapered alloy steerer, 150mm of travel

FRAMESET

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

Seat Binder

Specialized bolt-type, alloy, 38.6mm

DRIVETRAIN

Cassette

Shimano SLX, 11-speed, 11-46t

Bottom Bracket

Race Face PF30

Rear Derailleur

Shimano XT, Shadow Plus, GS cage, 11-speed

Chain

KMC X11, 11-speed w/ Missing Link™

Chainrings

Steel, 30T

Crankset

RaceFace Aeffect, 24mm spindle, 170mm crankarm

Shift Levers

Shimano SLX, 11-speed

ACCESSORIES

Pedals

Specialized Body Geometry Fitness, platform, plastic

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

Geometry

SMLXL
Handlebar Width780mm780mm780mm780mm
Stem Length45mm45mm45mm45mm
Saddle Width143mm143mm143mm143mm
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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