Specialized Stumpjumper 15 Expert AXS 2026

The Stumpjumper 15 eliminates compromise in the world of trail riding. Want to devour big obstacles like a bike with generous travel? Done. Control, handling, and efficiency? Done. Extensive customization options to make it perfect for the only rider who really matters: you? Done, done, done.

GENIE fulfills the desires of every trail rider
We invented this patent-pending air spring technology to fulfill the desires of every trail rider: the hold and traction of coil spring suspension, improved bottom-out prevention compared to standard air springs, and independently adjustable mid- and end-of-travel resistance.

What's inside GENIE
Discover how GENIE combines the linearity of a coil spring that improves control in the “absorption zone” with the progressiveness of air suspension in the final part of the stroke to reduce bottoming out. It's the best of both worlds—coil and air—with greater adjustability. Say goodbye to compromises and welcome the future of mountain biking.

Find your perfect ride with adjustable geometry
The Stumpjumper 15 boasts the most performance-oriented trail geometry on the planet. With 6-way adjustment, customize your ride to suit your style and terrain. Explore our interactive Geo Finder to find your ideal setup.

Devour obstacles like our Enduro
GENIE shock technology gives the Stumpy 15 16.3% better impact performance than the Stumpjumper EVO “Bike of the Year.” It literally uses more travel over the same obstacles, thanks to greater linearity in the first 70% of the stroke.

57% better traction
GENIE offers 57% more traction than a standard air shock because GENIE technology provides coil spring-like support that keeps the wheel in contact with the ground longer than a typical air shock.

Goodbye, bottoming out
Ride with confidence knowing that in field testing, GENIE reduced bottoming out by 39% compared to a standard FOX Float air shock.

Features

• Lightweight FACT 11m carbon fiber frame.
• FOX FLOAT Performance shock with Ride Dynamics tuning and GENIE technology.
• FOX FLOAT 36 Performance Elite fork with GRIP X2 damper.
• Roval Traverse wheels with DT Swiss 370 hubs.
• SRAM GX Eagle T-Type AXS drivetrain.
• SRAM Maven Bronze 4-piston brakes.
• PNW LOAM dropper seatpost with adjustable travel.

Tech spec

Suspension

• 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

Brakes

• Front brake: SRAM Maven Silver, 4-piston caliper, hydraulic disc, 200mm Centerline Rotor
• Rear brake: SRAM Maven Silver, 4-piston caliper, hydraulic disc, S1-S2: 180mm, S3-S6: 200mm Centerline Rotor

Drivetrain

• Shifters: SRAM AXS POD Controller w/discrete clamp
• Rear derailleur: SRAM GX Eagle AXS Transmission
• Cassette: SRAM XG-1275 T-Type 12-Speed 10-52
• Chain: SRAM GX Eagle Transmission 12-Speed Flattop Chain
• Crankset: SRAM GX Eagle Crankset, S1-S3: 165mm, S4-S6: 170mm, 32T ring, Integrated Guard, 55mm Chainline
• Bottom Bracket: SRAM DUB Threaded Wide

Wheels

• Front tire: Butcher, GRID TRAIL casing, Gripton T9 compound, 29X2.4
• Front wheel: Roval Traverse 29" Rim, hookless alloy, 30mm inner width, tubeless ready, DT Swiss 370 Hub, 15x110mm, 28h, Sapim Force Spokes
• 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 Hub, 15x110mm, 28h, Sapim Force Spokes
• Inner tubes: Standard, Presta Valve

COCKPIT

• Handlebar stem: Alloy Trail Stem, 35mm bar bore
• Saddle: Bridge Comp, Hollow Cr-mo rails S1-S2: 155mm, S3-S6: 143mm
• Handlebar: 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
• Seatpost: PNW Loam Dropper, tool-less travel adjust, Range lever, 34.9, S1: 125mm, S2: 150mm, S3: 175mm, S4-S5: 200mm, S6: 225mm

Frame

• 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 collar: Alloy, 38.6mm
• SWAT: SWAT 4.0 internal downtube storage

Producer's weight: 14.61 kg (size S4)

Producer's notes: depending on component availability, specifications are subject to change without notice. Images are for illustrative purposes only.