Icon
Search Icon
Clear Icon
Search Icon
Clear Icon

Men's S-Works Stumpjumper 29

Icon

2018 Men's S-Works Stumpjumper 29

We've heard it all before: "This bike's for going fast, that one's for having fun." "This one pedals well, that one shreds." Why not make one bike that does everything well? Well, we did, and it's called the S-Works Stumpjumper. Unrivaled handling and stiffness, sublime suspension kinematics, and a complete abandon of proprietary nonsense—it rides like a dream. And with 29-inch wheels, you're free to climb and descend at the hyper speed that 29ers are known for.

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.

As with every S-Works build, this S-Works Stumpjumper 29 comes with only top-of-the-line parts, like a full SRAM XX1 Eagle drivetrain, SRAM Guide RSC disc brakes, FOX Factory front and rear suspension (150/140mm respectively), and the best carbon wheels money can buy, the Roval Traverse SL 29.

Technical Specifications

Add Icon

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, 140mm of travel

SEAT BINDER

Specialized bolt-type, alloy, 38.6mm

SUSPENSION

REAR SHOCK

FOX FLOAT DPX2 Factory, Rx Trail Tune, EVOL Air sleeve, Kashima Coat, 3-position adjustment w/ Open Mode adjustment, 210x50mm

FORK

FOX 36 29" 150mm FACTORY

COCKPIT

STEM

Syntace MegaForce 2, 6-degree, 31.8mm clamp

HANDLEBARS

Specialized Trail, FACT carbon, 6-degree upsweep, 8-degree backsweep, 27mm rise, 780mm, 31.8mm

GRIPS

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

SADDLE

Body Geometry Phenom Expert, Adaptive Edge design, hollow titanium rails, carbon fiber base, 143mm

SEATPOST

Command Post IRcc, 16-position micro-height adjustable, two-bolt head, bottom mount cable routing, remote SRL lever, 34.9mm, S: 130mm, M/L/XL: 160mm of travel

BRAKES

FRONT BRAKE

SRAM Guide RSC, hydraulic disc, organic pads, Guide S4 4-piston caliper, 200mm rotor

REAR BRAKE

SRAM Guide RSC, hydraulic disc, organic pads, Guide S4 4-piston caliper, 180mm rotor

DRIVETRAIN

REAR DERAILLEUR

SRAM XX1 Eagle, 12-speed

SHIFT LEVERS

SRAM XX1 Eagle, trigger, 12-speed

CASSETTE

SRAM XG-1295 Eagle, 12-speed, 10-50t

CHAIN

SRAM XX1 Eagle, 12-speed w/ PowerLock®

CRANKSET

SRAM XX1 Eagle, Boost™ 148, 170mm crankarm, 24mm spindle

CHAINRINGS

30T

BOTTOM BRACKET

SRAM GXP

WHEELS

RIMS

Roval Traverse SL 29, hookless carbon, 30mm inner width, 24h/28h, tubeless ready, hand-built

FRONT HUB

Roval Traverse, sealed cartridge bearings, 15mm thru-axle, 110mm spacing, 24h

REAR HUB

Roval Traverse, DT Swiss Star Ratchet, 54t engagement, SRAM XD driver body, 12mm thru-axle, 148mm spacing, 28h

SPOKES

DT Swiss Revolution

FRONT TIRE

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

REAR TIRE

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

INNER TUBES

Standard, Presta valve

ACCESSORIES

PEDALS

Specialized Dirt

* 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

Add Icon
SMLXL
Crank Length170MM170MM170MM170MM
Handlebar Width780mm780mm780mm780mm
Stem Length40MM40MM50MM50MM
Saddle Width143mm143mm143mm143mm
Seatpost Length369mm429mm429mm429mm
Stack614mm614mm641mm656mm
Reach405mm425mm445mm470mm
Head Tube Length95mm95mm125mm140mm
Head Tube Angle66.5°66.5°66.5°66.5°
BB Height342mm342mm342mm342mm
BB Drop33mm33mm33mm33mm
Trail107mm107mm107mm107mm
Fork Length, Full560mm560mm560mm560mm
Fork Rake/Offset51mm51mm51mm51mm
Front Center714mm734mm766mm797mm
Chainstay Length437mm437mm437mm437mm
Wheelbase1149mm1169mm1201mm1232mm
Top Tube Length, Horizontal572mm595mm628mm662mm
Bike Standover Height747mm750mm762mm775mm
Seat Tube Length380mm410mm455mm505mm
Seat Tube Angle74.8°74.5°74.1°73.7°
Geometry

Rider Reviews

  • 4.3
  • 3 Reviews

Great but not Perfect

This bike absolutely rips the downhills. Specialized didn't lie when they said they made ""the stiffest frame ever."" With that Ultrastiff frame comes very responsive handling and a very playful feel in the bike. That being said, if you're looking for a race bike, this is not it! This bike is definitely designed to be quick and nimble as opposed to long, slack, and designed to go over everything in it's path. For ""The Ultimate Trail Bike"" I expected it to climb much better than it does. The bike has a lot of pedal bog on the climbs which was a bummer to me...


Name:
Stumped S.

Helpful?

Almost Perfect

Most of the bike is perfect but the dropper post belongs in the trash. I can not believe that the SWORKS Stumpy came with such a useless dropper. I love the bike but the dropper came off after just 2 rides. Can't give it away. total garbage.


Name:
Robert

Helpful?