Specialized Stumpjumper 15 Expert | Mountain Bike

Stumpjumper 15 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.

BREAKTHROUGH CAPABILITY: GENIE Shock Technology combines a poppy, playful ride with a bottomless DH feel.

ULTIMATE CONTROL: Measurably better traction than “Bike of the Year” Stumpjumper EVO.

UNMATCHED PERSONALIZATION: Six-way geometry adjustment, mixed wheel or 29”, tunable spring curve, and more.

GENIE: The Magic Carpet Ride: The biggest innovation on the Stumpjumper 15 Alloy is GENIE. This patent-pending air spring technology Specialized invented grants every trail rider three wishes: the maximum grip and traction of a coil spring feel, better bottom-out prevention than a standard air spring, and the ability to tune mid-stroke and end-stroke support independently.

ILLUMINATING GENIE: 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 avoid bottom-outs. Truly, it's the best of both worlds – coil and air – with extra tunability. Say goodbye to compromises and hello to the future of riding.

WHAT BUMP?: With 16.3% better bump force management than a traditional air-sprung shock, GENIE makes the Stumpjumper 15 Alloy ride like a bike with more travel. For example, the Stumpjumper 15 Alloy (with 145 mm rear wheel travel) and the Enduro (170 mm travel) both use 101 mm of travel to absorb a 1080 N bump force.

TRACTION GALORE: Extensive field testing proves that Stumpjumper 15 Alloy with GENIE delivers 57% better traction 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: 39% fewer bottom-outs than a standard air spring. During big hit events, you benefit from the rising rate in the last 30% of the GENIE stroke. Because of this two-stage, pronounced rising rate, GENIE reduces the frequency and severity of bottom-outs.

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, any terrain. The head angle and bottom bracket height can be fine-tuned for stability or clearance.

WHEEL CHOICE: With an 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 4.0 on Stumpjumper 15 elevates downtube storage, an innovation we pioneered. It’s the smoothest operating, most weather-resistant, flush-mounted system ever.

MORE RELENTLESS THAN YOU: These 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. Specialized unbeatable lifetime, no-questions-asked replacement suspension pivot bearings to the original owner is just one way they've got you covered.

• Lightweight FACT 11m carbon chassis and rear-end
• Ride Dynamics tuned FOX FLOAT Performance Elite with Specialized GENIE Shock Tech. Highly adjustable 2-position open and firm mode with the 3-position open mode compression adjuster
• Eat up the chunkiest trails with the FOX FLOAT 36 Performance Elite fork with GRIP X2 damper
• Strong and trusted Roval Traverse wheels, DT Swiss 370 hub
• Smooth and precise shifting from SRAM GX Eagle T-Type AXS drivetrain
• Big braking power from SRAM Maven Bronze 4-piston brakes
• Adjustable travel with PNW LOAM dropper post
• Lifetime replacement of suspension pivot bearings to the original owner
• Compatible with electronic drivetrains only

SPECIFICATIONS
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
FORK – FOX FLOAT 36 Performance Elite, GRIP X2 damper, HS and LS rebound and compression adjustment, 15x110mm QR axle, 44mm offset, S1:140mm of travel, S2-S6:150mm of travel
REAR SHOCK – FOX FLOAT Performance Elite with Specialized GENIE Shock Tech, Ride Dynamics Trail Tune, 2-position lever w/3 setting Open mode tuning range, LSR adjustment, S1:210x52.5mm, S2-S6:210x55mm
FRONT WHEEL – DT Swiss 370, 15x110mm, 28h w/ Roval Traverse, hookless alloy, 30mm inner width, tubeless ready, Front: 29, Rear: S1-S2: 27.5, S3- S6: 29
REAR WHEEL – DT Swiss 370, 12x148mm, 28h w/ Roval Traverse, hookless alloy, 30mm inner width, tubeless ready, Front: 29, Rear: S1-S2: 27.5, S3- S6: 29
FRONT TIRE – Butcher, GRID TRAIL casing, GRIPTON® T9 compound, 2Bliss Ready, 29x2.3"
REAR TIRE – Eliminator, GRID TRAIL casing, GRIPTON® T7 compound, 2Bliss Ready, S1-S2: 27.5x2.3, S3- S6: 29x2.3"
CRANKSET – SRAM GX Eagle Crankset, Integrated Guard, 55mm Chainline, S1-S3:165mm, S4-S6: 170mm
CHAINRING – 32T
BOTTOM BRACKET – SRAM DUB, BSA 73mm Wide, Threaded
REAR DERAILLEUR – SRAM GX Eagle Transmission, 12-speed
SHIFT LEVER – SRAM AXS POD Controller, 12-speed
CASSETTE – SRAM GX Eagle Transmission, 10-52t, 12-speed
CHAIN – SRAM GX Eagle Transmission Flattop
FRONT BRAKE – SRAM Maven Bronze, 4-piston caliper, hydraulic disc, 200mm HS2 Rotor
REAR BRAKE – SRAM Maven Bronze, 4-piston caliper, hydraulic disc, S1-S2: 180mm, S3-S6: 200mm HS2 Rotor
HANDLEBAR – Specialized, 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
STEM – Alloy Trail Stem, 35mm bar bore
SEAT POST – PNW Loam Dropper, tool-less travel adjust, Range lever, 34.9, S1: 125mm, S2: 150mm, S3: 170mm, S4-S6: 200mm
SADDLE – Bridge Comp, Hollow Cr-mo rails, S1-S2: 155mm, S3-S6: 143mm