Lighter, stiffer and more capable than ever. The Specialized Stumpjumper Comp Carbon 29 is built around a brand-new carbon fibre frame with an asymmetric design for improved performance. With neat touches like SWAT storage, ‘flip chip’ adjustable geometry and easy routing cables the new stumpy takes trail riding to the next level.
Don't worry, S-Works doesn't get to have all of the fun—the new Stumpjumper Comp Carbon 29 features the same frame with a full 11m carbon chassis and rear-end as its older brother, but with a solid list of no-fuss components for an everyman's budget.
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 dialling-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 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 SLX drivetrain with RaceFace cranks, Shimano SLX disc brakes, FOX front and rear suspension, and Roval Traverse 29 wheels.
All Tredz bikes are:
In the box with every Tredz bike is:
|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 tra|
|Fork:||FOX FLOAT Rhythm 34, GRIP Damper, 51mm offset, 2-position sweep adjust, 15x110mm, tapered alloy steerer, 150mm of travel|
|Rear Shock:||FOX FLOAT DPS Performance, Rx Trail Tune, rebound and 3-position compression adjust, 210x50mm|
|Stem:||Specialized Trail, 3D forged alloy, 4-bolt, 6-degree rise|
|Bars:||Specialized, 6061 alloy, 6-degree upsweep, 8-degree backsweep, 27mm rise, 780mm width|
|Front Brake:||Shimano SLX, hydraulic disc, resin pads, 200mm rotor|
|Rear Brake:||Shimano SLX, Hydraulic Disc, Resin Pad|
|Rear Mech:||Shimano XT, Shadow Plus, GS cage|
|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 Tyre:||Butcher, GRID casing, GRIPTON® compound, 2Bliss Ready, 29x2.6"|
|Rear Tyre:||Purgatory, GRID casing, GRIPTON® compound, 2Bliss ready, 29 x2.6"|
|Seat Post:||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|
|Chainset:||RaceFace Aeffect, 24mm spindle, 170mm crankarm, 30T|
|Bottom Bracket:||Threaded BB, 24mm spindle|
|Chain:||KMC X11, 11-speed w/ Missing Link™|
|Cassette:||Shimano SLX, 11-speed, 11-46t|
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As cyclists ourselves, we know you will be keen to get out on your new bike as soon as possible. That's why we provide you with all the essential kit you need to get your shiny new bike rolling for the first time.
Most bikes don't come with pedals as standard so we include a set of basic pedals, free of charge with every bike we send out. We will also provide you with a pedal spanner to fit them and a 9-key trail tool, along with full instructions for setting your bike up out of the box. Each bike is sent out with a 16 point, quality control check sheet so you can be confident that your bike has been fully checked by our qualified mechanics.
All these items are provided at no extra charge and are packed into a Tredz drawstring bag that doubles up as a handy backpack for carrying your ride essentials.