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Stumpjumper Expert 650b

2018 Stumpjumper Expert 650b

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 wheels provide. Knowing this, we built our Stumpjumper Expert 650b to be the ultimate all- rounder trail bike.

It features our FACT 9m carbon fibre for the bulk of the construction in order to provide an ultra-lightweight, strong, and stiff frame. The carbon moulding process also allowed us to revolutionise 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.

You'll also find an aggressive, nimble geometry to complement the 650b wheels that features ridiculously short chainstays, a roomy top tube, a low bottom bracket, and a slacked out front end. And for the build, we spec'd some of SRAM's best performing and durable 12-speed components, a FOX 34 Performance fork with 150mm of travel, and hand-built Roval Traverse 650b carbon wheels. It's a bike that will have you never looking back—unless it's to see your buddies eating your dust.

Technical Specifications

FRAMESET

FRAME

FACT 9m carbon front chassis w/ Specialized M5 Aluminum rear end, 27.5 Trail Geometry, SWAT™ Door integration, PF30 BB, fully enclosed internal cable routing, 12x148mm dropouts, sealed cartridge bearing pivots, replaceable derailleur hanger, 150mm of travel

SEAT BINDER

Alloy, 34.9mm

SUSPENSION

REAR SHOCK

RockShox Monarch RT3, Rx Trail Tune, AUTOSAG, rebound and 3-position compression adjust, 197x48mm

FORK

FOX 34 Performance 27.5, 44mm offset, 15x110mm thru-axle, 150mm of travel

WHEELS

SPOKES

DT Swiss Industry, stainless, 3-cross, 2.0"

REAR HUB

Specialized, sealed cartridge bearings, 12x148mm thru-axle, 28h

RIMS

Roval Traverse Carbon 27.5, hookless carbon, 30mm inner width, 24/28h, tubeless ready, hand-built

FRONT HUB

Specialized, sealed cartridge bearings, 15x110mm spacing, 24h

FRONT TIRE

Butcher, GRID casing, Gripton compound, 2Bliss Ready, 27.5 x 2.6"

REAR TIRE

Butcher, GRID casing, Gripton compound, 2Bliss Ready, 27.5 x 2.6"

INNER TUBES

Standard, Presta valve

DRIVETRAIN

REAR DERAILLEUR

SRAM GX Eagle, 12-speed

SHIFT LEVERS

SRAM GX Eagle, trigger, 12-speed

BOTTOM BRACKET

PF30

CRANKSET

Truvativ Descendant, aluminum, Boost™ 148, 170mm crankarm, 30mm spindle

CHAINRINGS

32T

CASSETTE

SRAM GX Eagle, 12-speed, 10-50t

CHAIN

SRAM GX Eagle, 12-speed w/ PowerLock®

COCKPIT

SEATPOST

Command Post IRcc, 12-position micro-height adjustable, alien head design, bottom mount cable routing, remote SRL lever, 30.9mm, S: 100mm, M/L/XL: 125mm of travel

SADDLE

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

HANDLEBARS

Specialized Trail, 7050 alloy, 8-degree backsweep, 6-degree upsweep, 27mm rise, 780mm, 31.8mm clamp

STEM

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

GRIPS

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

ACCESSORIES

PEDALS

Specialized Platform, Cr-Mo, 9/16" spindle

BRAKES

REAR BRAKE

SRAM Guide R, hydraulic disc, organic pads, Guide S4 4-piston caliper, 180/160mm rotor

FRONT BRAKE

SRAM Guide R, hydraulic disc, organic pads, Guide S4 4-piston caliper, 200/180mm rotor

* Weights based on production painted frames as pictured. Actual weights will vary based on colourway, frame size, and component variation. Specifications are subject to change without notice.

Geometry

SMLXL
Crank Length170MM170MM170MM170MM
Handlebar Width780mm780mm780mm780mm
Stem Length45MM60MM60MM60MM
Saddle Width143mm143mm143mm143mm
Seatpost Length390mm430mm430mm430mm
Stack590mm599mm608mm617mm
Reach388mm414mm442mm464mm
Head Tube Length105mm115mm125mm95mm
Head Tube Angle67°67°67°67°
BB Drop18mm18mm18mm18mm
Trail104mm104mm104mm104mm
Fork Length, Full542mm542mm542mm542mm
Fork Rake/Offset46mm46mm46mm46mm
Front Centre677mm706mm738mm764mm
Chainstay Length420mm420mm420mm420mm
Wheelbase1096mm1126mm1158mm1184mm
Top Tube Length, Horizontal558mm587mm618mm646mm
Bike Standover Height742mm748mm762mm764mm
Seat Tube Length396mm430mm468mm523mm
Seat Tube Angle74°74°74°74°
Geometry

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