Don’t worry, S-Works doesn’t get to have all of the fun—the new Specialized Stumpjumper Comp Carbon 29er features the same frame as the S-Works, with a full 11m carbon chassis and rear-end. Only here, Specialized has included a solid list of no-fuss components, including a SRAM NX Eagle 12-speed groupset for the everyman’s budget.
The design goal for the new Specialized Stumpjumper Comp Carbon 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, Specialized had to get to work on dialing-in the materials, shapes, and the layout.
They started by creating their own mountain-specific stiffness test, and then they looked at the layout with Finite Element Analysis (FEA) to see where they 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. So Specialized was 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, they 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.
Specialized 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 they 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—Specialized 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 made room for up to a 3.0″ tire. You’re also free to run whatever aftermarket rear shock you want, since standard metric shocks are now a part of the build. Specialized also 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, they 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 12-speed SRAM NX Eagle drivetrain, SRAM Guide R disc brakes, FOX front and rear suspension, and Roval Traverse 29 wheels.
Specialized Stumpjumper Comp Carbon Features:
- The Stumpjumper’s asymmetrical, FACT 11m carbon fiber construction is lightweight, stiff, and ready to take on the trail. It’s built off our 29 Trail Geometry, so it’s just the right amount of both capable and comfortable. And with SWAT™ integration in the down tube, a threaded BB, easy cable routing, and an all 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 wheel or frame size, your bike is dialed-in perfectly.
- SRAM’s 12-speed NX Eagle groupset features a wide gear range that delivers climbing and descending efficiency in spades.
|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|
|REAR SHOCK||FOX FLOAT DPX2 Performance, Rx Trail Tune, EVOL Air sleeve, 3-position adjustment, 210x50mm|
|FORK||FOX FLOAT Performance, GRIP damper, 3-position micro-adjustment, tapered alloy steerer, 44mm offset, 150mm of travel|
|STEM||Specialized Trail, forged alloy, 4-bolt, 5mm rise, 40mm|
|HANDLEBARS||Specialized Trail, 7050 alloy, 8-degree backsweep, 6-degree upsweep, 27mm rise, 780mm, 31.8mm clamp|
|GRIPS||Deity, Knuckleduster, Black|
|SADDLE||Body Geometry Myth 155 S, Body Geometry Henge 143 M/L/XL, hollow cr-mo rails|
|SEATPOST||X-Fusion Manic, infinite adjustable, two-bolt head, bottom mount cable routing, remote SRL LE lever, 34.9mm, S: 125mm, M/L: 150mm, XL: 170mm|
|FRONT BRAKE||SRAM Code R, 4-piston caliper, hydraulic disc, 200mm|
|REAR BRAKE||SRAM Code R, 4-piston caliper, hydraulic disc, 180mm|
|REAR DERAILLEUR||SRAM GX Eagle, 12-speed|
|SHIFT LEVERS||SRAM GX Eagle, trigger, 12-speed|
|CASSETTE||SRAM GX Eagle, 12-speed, 10-50t|
|CHAIN||SRAM GX Eagle, 12-speed|
|CRANKSET||SRAM Descendant, Boost™, DUB, 170mm|
|BOTTOM BRACKET||SRAM DUB, threaded BB|
|RIMS||Roval Traverse Carbon 29, hookless carbon, 30mm inner width, hand-built, 2Bliss Ready|
|FRONT HUB||Roval Traverse Carbon 29, hookless carbon, 30mm inner width, hand-built, 15x110mm spacing, 2Bliss Ready, 28h|
|REAR HUB||DT Swiss 370, 3-Pawl System, SRAM XD driver body, 12mm thru-axle, 148mm spacing, 28h|
|SPOKES||DT Swiss Industry|
|FRONT TIRE||Butcher, GRID TRAIL casing, GRIPTON® compound, 2Bliss Ready, 29×2.6″|
|REAR TIRE||Eliminator, GRID TRAIL casing, GRIPTON® compound, 2Bliss Ready, 29×2.3″|
|INNER TUBES||Standard, Presta valve|