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3,350$

My son grew out of this bike – he’s 5′ 4″.
Fits bigger than an XS.

If your idea of trail riding follows the philosophy of “go big or go home,” you simply can’t beat the agility and responsiveness that a 650b provides. Knowing this, we built our Stumpjumper FSR Expert Carbon 650b to be the ultimate all-rounder trail bike. It features SRAM’s workhorse one-by groupset, X1, and Shimano’s dependable, no-holds-barred XT hydraulic disc brakes to round out a build that places an equal focus on durability and efficiency. At the frame, you’ll find our FACT 9m carbon fiber that creates a lightweight, strong, and stiff construction. The carbon molding process also allowed us to revolutionize how you carry your trail essentials with the all-new SWAT Door found at the down tube. This compartment will fit a tube, a tool, and pump without rattling or compromising the structural integrity of the frame. And when you factor in our proprietary Rx Trail Tune at the shock, plus an aggressive, trail-eating geometry that features ridiculously short chainstays, a roomy top tube, a low bottom bracket, and a slacked out front end, you truly do get a bike that refuses to compromise.
RockShox Pike RC 650b fork features a 15mm Maxle Ultimate thru-axle and 150mm of plush travel to take on big hits and bumpy terrain with supreme confidence and efficiency.
650bx2.3” Specialized Butcher Control front tire inspires confidence through any terrain.
Command Post IRcc seatpost features 12 positions of up to 125mm of height adjustability for a more customizable position, ultimately resulting in more control and increased handling on both climbs and descents.
650bx2.3” Specialized Purgatory Control rear tire delivers reliable traction over a diverse section of soils and conditions.
FACT 9m carbon fiber Trail Chassis with Stumpjumper FSR M5 alloy rear end blends stiffness with light weight to form the pinnacle of efficiency, while 150mm of travel, fully enclosed cable routing, and integrated SWAT Door create exceptional handling and zero-hassle storage.
Connected with our FSR 6-Pack Linkage, a custom FOX FLOAT Factory rear shock features AUTOSAG for easy setup and 150mm of plush, adjustable suspension, while our Rx Trail Tune provides a more supple, responsive, and efficient feel for climbing up and descending down the trail.

Technical Specifications
FRAMESET
FRAME

FACT 9m carbon, Trail 650b Geometry, FACT IS carbon construction, M5 alloy rear triangle, SWAT Door integration, fully enclosed internal cable routing, 142mm dropouts, sealed cartridge bearing pivots, replaceable derailleur hanger, front derailleur compatible w/ Taco Blade, 150mm travel

HEADSET

Hella Flush, 1-1/8″” and 1-1/2″” threadless, Campy style upper w/ 1-1/2″” lower, cartridge bearings

SEAT BINDER

Specialized, 7050 alloy, single bolt, 34.9mm

SUSPENSION
REAR SHOCK

Custom FOX FLOAT Factory CTD, AUTOSAG, Rx Trail Tune, Boost Valve, Kashima coating, 197×47.6mm

FORK

RockShox Pike RC 650b, Solo Air spring, 150mm travel, compression adjust, rebound adjust, tapered steerer, 42mm offset, 15mm Maxle Ultimate thru-axle

WHEELS
RIMS

Roval Traverse 650b, alloy, disc, 29mm inner width, 24/28h

FRONT HUB

Roval Traverse, 15/20mm thru-axle, 24h

REAR HUB

Roval Traverse 142+, SRAM XX1 driver body, 12mm thru-axle, 28h

SPOKES

DT Swiss Revolution

FRONT TIRE

Specialized Butcher Control, 60TPI, 2Bliss Ready, folding bead, 650bx2.3″”

REAR TIRE

Specialized Purgatory Control, 60TPI, 2Bliss Ready, folding bead, 650bx2.3″”

INNER TUBES

Standard, Presta valve

DRIVETRAIN
REAR DERAILLEUR

SRAM X1, 11-speed, alloy cage

SHIFT LEVERS

SRAM X1, 11-speed, trigger

CASSETTE

SRAM XG-1180, 11-speed, 10-42t

CHAIN

SRAM PC-X1, 11-speed

CRANKSET

Custom SRAM S-2200, carbon, PF30 spindle, 30T, 94mm BCD spider

BOTTOM BRACKET

SRAM, PF30, OS press-in bearings, sealed cartridge

COCKPIT
STEM

Specialized XC, 3D forged alloy, 4-bolt, 6-degree rise

HANDLEBARS

Specialized, 7050 alloy, 8-degree backsweep, 6-degree upsweep, 25mm rise, 750mm, 31.8mm

GRIPS

Specialized Sip Grip, light lock-on, half-waffle, S/M: regular thickness, L/XL: XL thickness

SADDLE

Body Geometry Henge Comp, hollow Cr-Mo rails, 143mm

SEATPOST

Command Post IRcc, cruiser control technology, micro-adjust height adjustable, alien head design, bottom mount cable routing, remote adjust SRL lever, 30.9mm, S: 100mm travel, M/L/XL: 125mm

BRAKES
FRONT BRAKE

Shimano XT, hydraulic disc, Ice-Tech metallic pads w/ fins, I-spec compatible, S/M: 180mm rotor, L/XL: 200mm rotor

REAR BRAKE

Shimano XT, hydraulic disc, Ice-Tech metallic pads w/ fins, I-spec compatible, S/M: 160mm rotor, L/XL: 180mm rotor

BRAKE LEVERS

Shimano XT, I-spec compatible