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2018 Men's Stumpjumper ST Comp Carbon 29

5

1 Reviews

With the same 11m carbon construction as the S-Works, the Stumpjumper ST Comp Carbon…

The All-New Stumpjumper

Product Details

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With the same 11m carbon construction as the S-Works, the Stumpjumper ST Comp Carbon 29 brings you transcendent handling, custom-tuned suspension, and an elimination of proprietary headaches—all while keeping the speed you look for with 29-inch wheels. And don't forget that with its "ST" distinction, this Stumpjumper gets slightly steeper angles and less suspension (130mm front/120mm rear), so you get more nimble and responsive climbing ability and sublime descending prowess.

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 materials, shapes, and the layout.

We started by creating our own mountain-specific stiffness test, and then we looked at the layout with Finite Element Analysis (FEA) to see where we could get the biggest stiffness improvements. This led to a big discovery: The Large and X-Large frames needed more front-end stiffness while the Smalls and Mediums were just fine. We were able to create a frame design that was 20% more efficient. And in the end, this proved to be one of the lightest trail frames on the market, today.

When designing the frame with the stiffness targets being a main goal, we developed a radical new sidearm design. The front-end and rear-end are connected at three points, and the sidearm helps keep all these points super stiff and connected, all while taking about 100 grams out of the rear-end. More explicitly, this minimizes frame flex when the rear suspension is active.

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. We revamped the SWAT™ box, too, making it sleeker, lighter, and with more volume. 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. Lastly, we seriously couldn't make cable routing any easier on carbon models. Full tubes can be found throughout the carbon frame, so all you have to do is push the cable and it'll come out the other end. No more lazy loop, hidden stashes of magnets, pokey spokes, or pillows to cry in.

The build on this Comp model comes with a list of components that deliver undeniable quality, like a Shimano XT/SLX drivetrain with RaceFace cranks, Shimano SLX disc brakes, a FOX FLOAT Rhythm 34 for with 130mm of travel, a FOX FLOAT DPS rear shock with 120mm of travel, and Roval Traverse 29 wheels.

  • The Stumpjumper ST's asymmetrical, FACT 11m carbon fiber construction is lightweight, stiff, and ready for technical climbs and rowdy descents. It's built off of our 29 Trail Geometry, so it's both capable and comfortable. And with SWAT™ integration in the down tube, a threaded BB, easy cable routing, and a brand new chain silencer, it's ready for anything the trail, or you, throw at it.
  • The FOX DPS Performance rear shock features our Rx Trail Tune, ensuring that no matter the frame or wheel size, your bike is dialed-in perfectly.
  • A FOX 34 Rhythm fork handles suspension duties up front with stiff stanchions and plenty of adjustability.

Technical Specifications

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FRAMESET

FRAME

FACT 11m, full carbon chassis and rear end, asymmetrical design, 29 Trail Geometry, SWAT™ Door integration, threaded BB, fully enclosed internal cable routing, 12x148mm dropouts, sealed cartridge bearing pivots, replaceable derailleur hanger, 120mm of travel

SEAT BINDER

Specialized bolt-type, alloy, 38.6mm

SUSPENSION

REAR SHOCK

FOX FLOAT DPS Performance, Rx Trail Tune, rebound and 3-position compression adjust, 190x42.5MM

FORK

FOX FLOAT Rhythm 34, GRIP Damper, 51mm offset, 2-position sweep adjust, 15x110mm, tapered alloy steerer, 130mm of travel

COCKPIT

STEM

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

HANDLEBARS

Specialized, 6061 alloy, 6-degree upsweep, 8-degree backsweep, 27mm rise, 780mm width

GRIPS

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

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

BRAKES

FRONT BRAKE

Shimano SLX, hydraulic disc, resin pads, 200mm

REAR BRAKE

Shimano SLX, hydraulic disc, resin pads, 180mm

DRIVETRAIN

REAR DERAILLEUR

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

SHIFT LEVERS

Shimano SLX, 11-speed

CASSETTE

Shimano SLX, 11-speed, 11-46t

CHAIN

KMC X11, 11-speed w/ Missing Link™

CRANKSET

RaceFace Aeffect, 24mm spindle, 170mm crankarm

CHAINRINGS

30T

BOTTOM BRACKET

Threaded BB, 24mm spindle

WHEELS

RIMS

Roval Traverse 29, hookless alloy, 29mm inner width, tubeless ready, 28h

FRONT HUB

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

REAR HUB

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

SPOKES

DT Swiss Industry

FRONT TIRE

Butcher, GRID Casing, GRIPTON® compound, 2Bliss Ready, 29x2.3"

REAR TIRE

Purgatory, GRID casing, GRIPTON® compound, 2Bliss Ready, 29x2.3"

INNER TUBES

Standard, Presta valve

ACCESSORIES

PEDALS

Specialized Dirt

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

Geometry

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SMLXL
Crank Length170mm170mm170mm170mm
Handlebar Width780mm780mm780mm780mm
Stem Length45MM45MM45MM45MM
Saddle Width143mm143mm143mm143mm
Seatpost Length376mm438mm438mm438mm
Stack607mm607mm635mm649mm
Reach415mm435mm455mm480mm
Head Tube Length95mm95mm125mm140mm
Head Tube Angle67.5°67.5°67.5°67.5°
BB Height333mm333mm333mm333mm
BB Drop39mm39mm39mm39mm
Trail99mm99mm99mm99mm
Fork Length, Full540mm540mm540mm540mm
Fork Rake/Offset51mm51mm51mm51mm
Front Center707mm727mm758mm789mm
Chainstay Length437mm437mm437mm437mm
Wheelbase1141mm1161mm1192mm1223mm
Top Tube Length, Horizontal569mm592mm624mm657mm
Bike Standover Height740mm743mm755mm768mm
Seat Tube Length380mm410mm455mm505mm
Seat Tube Angle75.8°75.5°75.1°74.7°
Geometry

Complete Your Ride

Rider Reviews

5

1 Reviews

 

FUNFUNFUNFUN

The very instant I took off on my manager's ST Stumpy onto my fav tracks, I was grinning ear to ear. My first comment - it's so fun! It is incredibly light on the jumps, super playful and fun, but capable on drops and descents. Even as a 29"" it is incredibly easy to maneuver. In fact, so easy, I had to get off the bike and double check I was on a 29ner, and not a 27.5! Yet it has all the benefits of a 29 - easy to climb, absorbs all the bumps and rocks. This is after being on a 2018 Stumpjumper for a few months - it feels like a completely new bike both in being agile and stiff. Brakes - Shimano SLX are perfect, hence why I went with this model. I love the simplicity of the Fox DPX2, without any compromise in my opinion. Each component seems to have been selected for the style of riding that a ST would warrant - nothing more and nothing less. I have owned this bike for a few weeks now, and I instantly smile every single time I ride. No joke - I am having so much fun I start laughing like an idiot even on my own. It's just FUN, and it pops like it loves being in the air. After a few months mending broken bones and having to be off the bike, I thought I'd be a whimp on the trails, but the confidence this bike has given me has me out there without hesitation. I've recommended and sold many of these bikes since getting one, on pure stoke levels.


Name:
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