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AT A GLANCE
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KINEMATICS PERFECTED: As the quintessential trail bike, Stumpjumper 15 Alloy balances efficiency and optimal bump force management. For the anti-squat on Stumpjumper 15 Alloy, we struck a balance between the previous Stumpjumper and Stumpjumper EVO, as both had excellent pedaling characteristics.
HONED GEOMETRY: This bike’s geometry delivers big bike capability when you need it, a nimble feel in tight sections, and lively, efficient climbing manners. The generous cockpit centers you on the bike, optimizing traction and corner control. The low bottom bracket, slack head tube angle, and optimized fork offset keep things stable in the rough.
RIDE YOUR WAY: The Stumpjumper 15 Alloy seamlessly integrates benchmark geo adjustability, making it the most personalizable trail bike ever. Six distinct geometry settings allow you to hone performance for any style and any terrain. The head angle and bottom bracket can be fine-tuned for stability or clearance.
FORM FOLLOWS FUN: We can make a frame as stiff as we want, but there’s such a thing as too stiff. To be one with the bike requires engineered compliance in the frame. We engineered the M5 Alloy chassis—front end, rear end, and the link between them—as a single unit that hits the stiffness target we established for trail riding.
WHEEL SIZE: All coil-sprung models come with mixed wheels.
WHEEL CHOICE: With our aftermarket link shock links, you can choose between big wheels front and rear or mix things up with a 27.5” rear for a more responsive and playful ride. No matter what you choose, geometry is unaffected.
CARRY IT ALL: SWAT on Stumpjumper 15 elevates downtube storage, an innovation we pioneered.
MORE RELENTLESS THAN YOU: Our full-suspension bikes are built to be relentless, designed to endure years of hard riding, and backed by the best support and programs to keep you on the trail. Our unbeatable lifetime, no-questions-asked replacement suspension pivot bearings to the original owner is just one way we've got you covered.
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SPECS
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| FRAMESET |
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Frame: M5 Alloy chassis and rear-end, Trail Geometry, SWAT™ Door integration, head tube angle adjustment, threaded BB, internal cable routing, 12x148mm dropouts, sealed cartridge bearing pivots, SRAM UDH compatible, 145mm of travel
Seat Binder: Alloy, 38.6mm
SWAT: SWAT internal downtube storage
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| SUSPENSION |
Rear Shock: FOX DHX Factory, Ride Dynamics Trail Tune, 210x55mm, S2: 400lbs, S3: 450lbs, S4: 500bs, S5: 550lbs, S6: 600lbs
Fork: FOX FLOAT 38 Factory, GRIP X2 damper, HS and LS rebound and compression adjustment, 15x110mm QR axle, 44mm offset, 160mm of travel
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| DRIVETRAIN |
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Shift Levers: Shimano SLX, M7100, 12spd
Rear Derailleur: Shimano SLX, M7100, SGS, 12-speed
Cassette: Shimano SLX, CS-M7100, 12-speed, 10-51t
Chain: Shimano SLX, M7100, 12-speed
Crankset: Shimano SLX, M7120, 32T ring, 55mm chainline, S2-S3:165mm, S4-S6: 170mm
Bottom Bracket: Shimano, BB-MT801, Threaded
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| BRAKES |
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Front Brake
TRP DH-R EVO, 4-piston caliper, hydraulic disc, 220mm
Rear Brake
TRP DH-R EVO, 4-piston caliper, hydraulic disc, 203mm
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| WHEELS & TIRES |
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Rims: Roval Traverse, hookless alloy, 30mm inner width, tubeless ready, Front: 29, Rear: 27.5
Front Hub: DT Swiss 370, 15x110mm, 28h
Rear Hub: DT Swiss 370, 12x148mm, 32h
Front Tire: Butcher, GRID TRAIL casing, GRIPTON® T9 compound, 2Bliss Ready, 29x2.3"
Rear Tire: Eliminator, GRID GRAVITY casing, GRIPTON® T9/T7 compound, 2Bliss Ready, 27.5x2.3"
Inner Tubes: Standard, Presta valve
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| COCKPIT |
Stem: Deity, 35mm clamp, 35mm length
Handlebars: Deity, Racepoint, 5-degree upsweep, 9-degree backsweep, 810 width, S2: 25mm rise: S3-S6: 38mm rise
Grips: Deity, Knuckleduster, Black
Saddle: Bridge Comp, Hollow Cr-mo rails, S1-S2: 155mm, S3-S6: 143mm
SeatPost: PNW Loam OE Dropper, tool-less travel adjust, Range lever, 34.9, S2: 150mm, S3: 170mm, S4-S6: 200mm
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