• The Best Trail Bike of the Year, Officially
  • Stumpjumper 15 has been named “Best in Test” by Enduro Magazine, standing out among the most advanced trail bikes of the year. With its GENIE suspension, balanced handling, and all-terrain versatility, it truly is One Bike to Rule All Trails.
• GENIE Grants Every Trail Rider’s Wishes
  • This game-changing, patent-pending air spring technology that we invented grants every trail rider three wishes: feel and control of a coil spring, better bottom-out prevention than a standard air spring, and a tunable “platform” for a playful feel.
• What’s Inside GENIE?
  • Check out how GENIE combines the control-enhancing linear spring rate of a coil spring through the “bump zone” with the progressive spring rate of an air spring at the end of the stroke to reduce bottom-outs. It's the best of both worlds – coil and air – with extra tuneability. Say goodbye to compromises and hello to the future of riding.
• 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 our interactive Geo Finder to pinpoint your ideal setting.
• Eats Bumps Like an Enduro
  • GENIE shock technology gives the Stumpy 15 16.3% better bump performance than ‘Bike of the Year’ Stumpjumper EVO. It literally uses more travel for the same size bump, thanks to its flatter spring curve in the first 70% of travel.
• 57% Better Traction
  • GENIE delivers 57% less traction loss time than a standard air-sprung shock because GENIE technology gives you supple, coil-like performance, which keeps the wheel in contact with the ground a greater percent of the time than a typical air spring would.
• Bye, Bye, Bottom Outs
  • Send it with confidence knowing that in field testing GENIE eliminated 39% of severe bottom out events compared to a standard FOX Float air spring.
• More Relentless Than You
  • Our full-suspension bikes are built to be relentless, desigend to endure years or hard riding, and backed by the best support and policies to keep you on the trail. Our unbeatable lifetime, no-questions-asked replacement suspension pivot bearings to the original owner (one bearing set, per bike, per year) is just one way we've got you covered. See your local Specialized Retailer for details.

Frame - FACT 11m carbon chassis and rear-end, Trail Geometry, SWAT™ Door integration, head tube angle adjustment, threaded BB, internal brake and dropper cable routing, 12x148mm dropouts, sealed cartridge bearing pivots, SRAM UDH compatible, 145mm of travel
Seat Binder - Alloy, 38.6mm
Rear Shock - FOX FLOAT X Performance Elite with Specialized GENIE Shock Tech, Ride Dynamics Trail Tune, 2-position lever, LSC adjustment, LSR adjustment, 210x55mm
Fork - FOX FLOAT 36 Performance Elite, GRIP X2 damper, HS and LS rebound and compression adjustment, 15x110mm Kabolt axle, 44mm offset, S1:150mm of travel, S2-S6:160mm of travel
Front Brake - Shimano Deore XT brake, 4 piston, Metal pad w/fin, 203mm rotor
Rear Brake - Shimano Deore XT brake, 4 piston, Metal pad w/fin, S1-S2: 180mm, S3-S6: 203mm rotor
Shift Levers - Shimano XT Di2
Rear Derailleur - Shimano XT Di2, 12-speed
Cassette - Shimano XT M8200, 12-speed, 10-51
Chain - Shimano XT M8100, 12-speed w/ quick link
Crankset - Shimano XT, 55mm chainline, 32T, S1-S3: 165mm, S4-S6: 170mm
Bottom Bracket - Shimano, BB-MT801, Threaded
Front Tire - Butcher, GRID TRAIL casing, GRIPTON® T9 compound, TLR, 29X2.4
Front Wheel - Roval Traverse 29" Rim, hookless alloy, 30mm inner width, tubeless ready, DT Swiss 370, 15x110mm, 28h, Sapim Force Spokes, 6 bolt
Rear Tire - Eliminator, GRID TRAIL casing, GRIPTON® T7 compound, TLR, S1-S2: 27.5x2.4, S3- S6: 29x2.4"
Rear Wheel - Roval Traverse Rim, hookless alloy, 30mm inner width, tubeless ready, DT Swiss 370, 15x110mm, 28h, Sapim Force Spokes, 6 bolt
Inner Tubes - Standard, Presta Valve
Stem - Alloy Trail Stem, 35mm bar bore
Handlebars - Specialized, 6000 series alloy, 6-degree upsweep, 8-degree backsweep. S1-S2: 780 width, 20mm rise: S3-S6: 800 width, 50mm rise
Grips - Deity Lockjaw Grips
Saddle - Bridge Comp, Hollow Cr-mo rails S1-S2:155mm, S3-S6:143mm
SeatPost - PNW Loam Dropper, tool-less travel adjust, Range lever, 34.9, S1: 125mm, S2: 150mm, S3: 175mm, S4-S5: 200mm, S6: 225mm
SWAT - SWAT 4.0 internal downtube storage
Weight - 14.48 kg (31 lb, 14.8 oz)

Specialized S-Sizing Chart (MTB/Trail)

• S1 (XS): 5'0" - 5'4" (152 - 163cm)
• S2 (S): 5'2" - 5'8" (158 - 173cm)
• S3 (M): 5'5" - 5'11" (165 - 180cm)
• S4 (L): 5'8" - 6'2" (173 - 188cm)
• S5 (XL): 5'10" - 6'4" (178 - 193cm)
• S6 (XXL): 6'2" - 6'6"+ (188 - 198+cm)

Key S-Sizing Principles

• Riding Style: If you are between sizes, choose smaller for more agility (jumping, tight trails) or larger for high-speed stability
• Standover Height: S-Sizing uses shorter seat tubes, meaning most riders can comfortably fit on two or more sizes
• Reach Matters: The main difference between sizes is the reach (horizontal distance from pedals to handle bars), not the height of the bike.