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Stumpjumper 15 Alloy is here to obliterate every trade-off in the trail game. Devour bumps like a big bike? Check. Short-travel control, playfulness, and efficiency? Double check.
Stumpjumper 15 Alloy is here to obliterate every trade-off in the trail game. Devour bumps like a big bike? Check. Short-travel control, playfulness, and efficiency? Double check.
Specialized

Specialized Stumpjumper Alloy 15 - 2025 Model in Satin Cast Blue / Grey

£2,549.00 £2,749.00 7% off
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It is important to everyone at Oneplanet Adventure that you are over the moon with your new purchase. However, if for any reason you aren’t, we do offer a 365-day returns policy. Items purchased from the Oneplanet Adventure website, with the exception of custom-built bikes, wheels or ex-demo / ex-rental bikes can be returned, provided the item has not been used or fitted and is in its original packaging with a valid proof of purchase.

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Specialized Stumpjumper Alloy 15 - 2025 Model in Satin Cast Blue / Grey

Season:MY25

Brand:Specialized

Code:93325-770

Stumpjumper 15 Alloy is here to obliterate every trade-off in the trail game. Devour bumps like a big bike? Check. Short-travel control, playfulness, and efficiency? Double check. How about a heaping helping of personalization to make it perfect for the only rider who really matters—you? Check, check, check.

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.

  • All-new M5 alloy frame with SWAT door integration

  • Ride Dynamics tuned X-Fusion 02 Pro RL shock with adjustable rebound and lockout

  • RockShox Psylo Silver fork with Motion Control Damper

  • Reliable Shimano MT-420 4-piston brakes

  • 12-speed Shimano Deore drivetrain

  • Lifetime replacement of suspension pivot bearings to the original owner

Technical Information
FrameM5 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
ForkRockShox, Psylo Silver, Motion Control Damper, 15x110 axle, 44mm offset, S1:140mm of travel, S2-S6:150mm of travel
Rear ShockX-Fusion 02 Pro RL, Ride Dynamics Trail Tune, rebound adjust, lockout S1:210x52.5mm, S2-S6:210x55mm
StemAlloy Trail Stem, 35mm bar bore
BarsSpecialized, 6000 series alloy, 6-degree upsweep, 8-degree backsweep. S1-S2: 780 width, 20mm rise; S3-S4: 800 width, 30mm rise; S5-S6: 800 width, 40mm rise
Front BrakeShimano, BR-MT420, 4-piston caliper, hydraulic disc, 203mm
Rear BrakeShimano, BR-MT420, 4-piston caliper, hydraulic disc, S1-S2: 180mm, S3-S6: 203mm
Rear MechShimano Deore, M6100, 12pd, Shadow Plus
ShiftersShimano Deore, M6100, 12spd
Speed12
RimsSpecialized Alloy, Tubeless Ready, 29mm internal width, 28h, Front: 29, Rear: S1-S2: 27.5, S3- S6: 29
Front HubAlloy, sealed cartridge bearings, 15x110mm thru-axle, 28h
Rear HubAlloy, sealed cartridge bearings, 12x148mm thru-axle, 28h
SpokesStainless, 14g
Front TyreButcher, GRID TRAIL casing, GRIPTON® T9 compound, 2Bliss Ready, 29x2.3"
Rear TyreEliminator, GRID TRAIL casing, GRIPTON® T7 compound, 2Bliss Ready, S1-S2: 27.5x2.3, S3- S6: 29x2.3"
Seat PostTranzX Dropper, remote SLR LE lever, 34.9, S1: 125mm, S2: 150mm, S3: 170mm, S4-S6: 200mm
SaddleBridge, Steel rails, S1-S2: 155mm, S3-S6: 143mm
ChainsetShimano Deore, M6120, 30T ring, 55mm chainline, S1-S3:165mm, S4-S6: 170mm
ChainShimano Deore, M6100, 12-speed
CassetteShimano Deore M6100, 12spd w/Hyperglide+, 10-51t
PedalsResin Platform
Weight16.57 kg
Sizing Information
S1S2S3S4S5
Crank Length165mm165mm165mm170mm170mm170mm
Handlebar Width780mm780mm800mm800mm800mm800mm
Stem Length40mm40mm40mm40mm40mm40mm
Saddle Width155mm155mm143mm143mm143mm143mm
Seatpost Length125mm150mm170mm200mm200mm200mm
Stack608mm618mm627mm640mm654mm667mm
Reach400mm425mm450mm475mm500mm530mm
Headtube Length95mm100mm110mm125mm140mm155mm
Headtube Angle64.5°64.5°64.5°64.5°64.5°64.5°
BB Height334mm337mm337mm337mm337mm337mm
BB Drop41mm38mm38mm38mm38mm38mm
Trail129mm130mm130mm130mm130mm130mm
Fork Length (full)551mm561mm561mm561mm561mm561mm
Fork Rake/Offset44mm44mm44mm44mm44mm44mm
Front Center720mm751mm780mm812mm843mm879mm
Chainstay Length430mm432mm435mm435mm445mm445mm
Wheelbase1149mm1181mm1213mm1244mm1285mm1322mm
Top-tube Length (horizontal)541mm573mm595mm624mm647mm677mm
Bike Standover Height738mm751mm745mm745mm745mm751mm
Seat Tube Length385mm385mm405mm425mm445mm465mm
Seat Tube Angle78°77°77°76.5°76.5°76.5°
Saddle Height for Effective ST Angle645mm690mm735mm780mm825mm870mm
Max Seatpost Insertion245mm245mm255mm255mm285mm285mm
Min Seatpost Insertion80mm80mm80mm80mm80mm80mm
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