Specialized Stumpjumper 15 Fox Coil Alloy 2025

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, Specialized 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
Specialized can make a frame as stiff as they want, but there’s such a thing as too stiff. To be one with the bike requires engineered compliance in the frame. Specialized engineered the M5 Alloy chassis—front end, rear end, and the link between them—as a single unit that hits the stiffness target Specialized established for trail riding.

Wheel size
All coil-sprung models come with mixed wheels.

Wheel choice
With the 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 Specialized pioneered.

More relentless than you
The 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. The unbeatable lifetime, no-questions-asked replacement suspension pivot bearings to the original owner is just one way Specialized has got you covered.

Unlock Your Ride with Tunable Geo
Stumpjumper 15 boasts the planet's most capable trail geometry. With six-way adjustability, tailor your ride to perfectly match your style and terrain. Explore the interactive Geo Finder to pinpoint your ideal setting.

Form Follows Fun
Specialized can make a frame as stiff as they want, but it turns out there’s such a thing as too stiff. To be one with the bike requires engineered compliance in the frame. Specialized engineered the FACT 11M carbon—front end, rear end, and the link between them—as a single unit that hits the stiffness target Specialized established for trail riding.

Features

• All-new M5 alloy frame with SWAT door integration
• Roval Traverse alloy wheels with DT Swiss hubs
• Ride Dynamics Tuned FOX DHX Factory coil shock
• Beefy FOX FLOAT 38 Factory fork with GRIP X2 damper
• Performance-focused and durable Shimano SLX drivetrain
• Big stopping power from TRP DH-R EVO 4-piston brakes
• Adjustable travel PNW LOAM dropper post
• Lifetime replacement of suspension pivot bearings to the original owner

Tech Specs

Frameset

• 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

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

Brakes

• Front Brake: TRP DH-R EVO, 4-piston caliper, hydraulic disc, 220mm
• Rear Brake: TRP DH-R EVO, 4-piston caliper, hydraulic disc, 203mm

Drivetrain

• 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

Wheels & Tires

• 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
• Spokes: Sapim Force
• 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

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

Weight

• Producer's weight: 16.90 kg (37 lb, 4.1 oz)
• Weight Size: S4

Producer's weight: Weights based on production painted frames as pictured. Actual weights will vary based on colourway, frame size, and component variation. Specifications are subject to change without notice.