Men's Stumpjumper ST Comp Carbon 27.5
$4,200.00
Part No.  

Men's Stumpjumper ST Comp Carbon 27.5

$4,200.00
Part No.  
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Men's Stumpjumper ST Comp Carbon 27.5
Overview
Technical Specifications
Geometry
Reviews

With the same 11m carbon construction as the S-Works, the Stumpjumper ST Comp Carbon 27.5 brings you transcendent handling, custom-tuned suspension, and an elimination of proprietary headaches—all while keeping the snappiness you look for with 27.5 wheels. And don't forget that with its "ST" distinction, this Stumpjumper gets slightly steeper angles and less suspension (130mm front/130mm 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 frame. 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 3.0" 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 130mm of travel, and Roval Traverse 27.5 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 27.5 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 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 27.5 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.
  • 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.
  • A FOX 34 Rhythm fork handles suspension duties up front with stiff stanchions and plenty of adjustability.

Technical Specifications

DRIVETRAIN
CHAIN KMC X11, 11-speed w/ Missing Link™
BOTTOM BRACKET Threaded BB, 24mm spindle
CRANKSET RaceFace Aeffect, 24mm spindle, 170mm crankarm
SHIFT LEVERS Shimano SLX, 11-speed
CASSETTE Shimano SLX, 11-speed, 11-46t
CHAINRINGS 32T
REAR DERAILLEUR Shimano XT, Shadow Plus, GS cage, 11-speed
SUSPENSION
FORK FOX FLOAT Rhythm 34, GRIP Damper, 51mm offset, 2-position sweep adjust, 15x110mm, tapered alloy steerer, 130mm of travel
REAR SHOCK FOX FLOAT DPS Performance, Rx Trail Tune, rebound and 3-position compression adjust, 190x42.5MM
WHEELS
FRONT HUB Specialized, sealed cartridge bearings, 15x110mm spacing, 28h
REAR HUB Specialized, sealed cartridge bearings, 12x148mm thru-axle, 28h
INNER TUBES Presta, 40mm valve
SPOKES DT Swiss Industry
RIMS Roval Traverse 27.5, hookless alloy, 29mm inner width, tubeless ready, 28h
FRONT TIRE Butcher, GRID Casing, GRIPTON® compound, 2Bliss Ready, 27.5 x 2.3"
REAR TIRE Purgatory, GRID casing, GRIPTON® compound, 2Bliss Ready, 27.5 x 2.3"
COCKPIT
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
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
BRAKES
FRONT BRAKE Shimano SLX, hydraulic disc, resin pads, 200mm
REAR BRAKE Shimano SLX, hydraulic disc, resin pads, 180mm
ACCESSORIES
PEDALS Specialized Dirt
FRAMESET
SEAT BINDER Alloy, 38.6mm
FRAME FACT 11m, full carbon chassis and rear end, asymmetrical design, 27.5 Trail Geometry, SWAT™ Door integration, threaded BB, fully enclosed internal cable routing, 12x148mm dropouts, sealed cartridge bearing pivots, replaceable derailleur hanger, 130mm of travel
The All-New Stumpjumper
The All-New Stumpjumper

Geometry

Geometry Chart

Stumpjumper ST - Geometry

S M L XL
  S M L XL
Crank Length 170MM 170MM 170MM 170MM
Stem Length 45MM 45MM 45MM 45MM
Seatpost Length 376mm 438mm 438mm 438mm
Saddle Width 143mm 143mm 143mm 143mm
Handlebar Width 780mm 780mm 780mm 780mm
Reach 425mm 444mm 465mm 490mm
Top Tube Length, Horizontal 568mm 591mm 624mm 657mm
Stack 586mm 590mm 618mm 631mm
Wheelbase 1149mm 1170mm 1203mm 1234mm
Chainstay Length 432mm 432mm 432mm 432mm
Front Center 718mm 739mm 772mm 803mm
BB Drop 28mm 28mm 28mm 28mm
BB Height 325mm 325mm 325mm 325mm
Seat Tube Angle 75.2° 75.6° 76° 76.3°
Head Tube Angle 66.5° 66.5° 66.5° 66.5°
Seat Tube Length 380mm 410mm 455mm 505mm
Head Tube Length 105mm 110mm 140mm 155mm
Bike Standover Height 731mm 735mm 750mm 766mm
Fork Rake/Offset 46mm 46mm 46mm 46mm
Fork Length, Full 522mm 522mm 522mm 522mm
Trail 103mm 103mm 103mm 103mm

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