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No need to fret—we haven’t forgotten about all you alloy fans out there. In fact, the new Stumpjumper Comp Alloy 27.5 may be the most radically designed alloy bike ever made. For real, though. And with new tube shapes, an asymmetrical design, and the nimble 27.5 handling that we all love, it's plenty capable and ready to take on the trail.
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 and shapes.
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. 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.
The build here is no-nonsense with a focus on dependable, high-performing parts, like a Shimano SLX drivetrain with RaceFace cranks, Shimano SLX disc brakes, FOX front and rear suspension, and Roval Traverse 27.5 alloy wheels.
|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|
|REAR DERAILLEUR||Shimano XT, Shadow Plus, GS cage, 11-speed|
|FORK||FOX FLOAT Rhythm 34 27.5, 44mm offset, 2-position, tapered alloy steerer, 15x110mm Boost™, 150mm of travel|
|REAR SHOCK||FOX FLOAT DPS Performance, Rx Trail Tune, rebound and 3-position compression adjust, 210x52.5mm|
|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 2.6"|
|REAR TIRE||Purgatory, GRID casing, GRIPTON® compound, 2Bliss Ready, 27.5 x 2.6"|
|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|
|FRONT BRAKE||Shimano SLX, hydraulic disc, resin pads, 200mm rotor|
|REAR BRAKE||Shimano SLX, Hydraulic Disc, Resin Pad|
|SEAT BINDER||Specialized bolt-type, alloy, 38.6mm|
|FRAME||M5 alloy chassis and rear end, asymmetrical design, 27.5 Trail Geometry, threaded BB, fully enclosed internal cable routing, 12x148mm dropouts, sealed cartridge bearing pivots, replaceable derailleur hanger, 150mm of travel|
|Top Tube Length, Horizontal||570mm||595mm||627mm||660mm|
|Seat Tube Angle||75.3°||75°||74.6°||74.2°|
|Head Tube Angle||65.5°||65.5°||65.5°||65.5°|
|Seat Tube Length||380mm||410mm||455mm||505mm|
|Head Tube Length||105mm||110mm||140mm||155mm|
|Bike Standover Height||752mm||757mm||769mm||770mm|
|Fork Length, Full||542mm||542mm||542mm||542mm|