Specialized Stumpjumper 15 Comp Alloy Bike 2026 Grey Blue/Cast Blue Metallic

GENIE Shock Technology defines the ride with a two-stage air spring that delivers coil-like traction through the bump zone and progressive bottom-out control at the end of the stroke. The M5 alloy frame integrates SWAT™ downtube storage, sealed cartridge bearing pivots, and 145mm of rear travel for consistent performance across varied terrain.

Specialized pairs the Stumpjumper 15 Comp Alloy Bike with Ride Dynamics–tuned FOX suspension and adjustable trail geometry for measurable gains in traction and control. The Specialized Stumpjumper 15 Comp Alloy balances stability and efficiency through six distinct geometry settings and compatibility with 29” or mixed-wheel configurations.

Key Features

• GENIE Shock Technology: Patent-pending air spring design combines linear coil-like performance with progressive air-spring bottom-out resistance and independent mid-stroke and end-stroke tuning.
• M5 Alloy Frame with SWAT™: M5 alloy chassis and rear-end with internal SWAT™ downtube storage, sealed cartridge bearing pivots, and 145mm of rear wheel travel.
• FOX FLOAT X Performance Rear Shock: Ride Dynamics Trail Tune with 2-position lever, low-speed rebound adjustment, and 210x55mm sizing.
• FOX FLOAT 36 Rhythm Fork: GRIP damper, 15x110mm axle, 44mm offset, and 150mm travel on S1 or 160mm travel on S2-S6.
• Six-Way Geometry Adjustment: Adjustable head tube angle and bottom bracket height for tuning stability, clearance, and handling.
• Mixed or 29” Wheel Compatibility: Supports 29” front and rear or mixed-wheel setup with geometry unaffected when used with aftermarket shock links.
• SRAM Eagle 70 Drivetrain: 12-speed system with 10-52t cassette, DUB threaded bottom bracket, and SRAM Eagle 70 crankset.
• SRAM DB8 4-Piston Brakes: Hydraulic braking system delivering consistent stopping power.
• Alloy Wheelset: Specialized hookless alloy rims with 30mm inner width, tubeless-ready design, and sealed cartridge bearing hubs.
• Lifetime Pivot Bearing Replacement: Lifetime replacement of suspension pivot bearings for the original owner.

Seat Binder	Alloy, 38.6mm
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
Fork	FOX FLOAT 36 Rhythm, GRIP damper, two position Sweep adjustment, 15x110mm QR axle, 44mm offset S1:150mm of travel, S2-S6:160mm of travel
Rear Shock	FOX FLOAT X Performance with Specialized GENIE Shock Tech, Ride Dynamics Trail Tune, 2-position lever, LSR adjustment, 210x55mm
Front Brake	SRAM DB8 Stealth
Rear Brake	SRAM DB8 Stealth
Cassette	SRAM XG-1270 Transmission Cassette, 12-speed,10-52t
Chain	SRAM 70 Transmission Chain
Bottom Bracket	SRAM DUB Threaded Wide
Shift Levers	SRAM EAGLE 70
Rear Derailleur	SRAM Eagle 70 Transmission, 12-speed
Crankset	SRAM Eagle 70, 55mm chainline, 32T
Front Tire	Butcher, GRID TRAIL casing, Gripton T9 compound, 29X2.4
Spokes	DT Swiss Elemental
Rear Tire	Eliminator, GRID TRAIL casing, GRIPTON® T7 compound, TLR, S1-S2: 27.5x2.4, S3- S6: 29x2.4"
Front Hub	Specialized alloy front hub disc, sealed cartridge bearings, 6-bolt, 15x110mm thru-axle, 28h
Rear Hub	Specialized alloy rear hub disc, sealed cartridge bearings, 6-Bolt, 12X148mm thru-axle, 28h, HG Steel Fhb
Rims	Specialized, hookless alloy, 30mm inner width, tubeless ready
Inner Tubes	Standard, Presta Valve
Stem	Alloy Trail Stem, 35mm bar bore
Saddle	Bridge Comp, Hollow Cr-mo rails S1-S2: 155mm, S3-S6:143mm
Grips	Specialized Trail Grips
Handlebars	Specialized, 6000 series alloy, 6-degree upsweep, 8-degree backsweep. S1-S2: 780 width, 20mm rise: S3-S6: 800 width, 50mm rise
SeatPost	X-Fusion Manic, infinite adjustable, two-bolt head, bottom mount cable routing, remote SLR LE lever, 34.9, S1: 125mm, S2: 150mm, S3: 170mm, S4-S6: 190mm
SWAT	Internal SWAT Downtube Storage