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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 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.

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.

  • FACT 9m carbon fibre Trail Chassis with Stumpjumper FSR M5 alloy rear end blends stiffness with light weight to form the pinnacle of efficiency, while fully enclosed cable routing and an integrated SWAT™ Door create exceptional handling and zero-hassle storage.
  • The FOX 34 fork features 150mm of plush travel to take on big hits and bumpy terrain with supreme confidence and efficiency.
  • SRAM's 12-speed GX Eagle drivetrain, with a Truvativ Descendent crank, features an ultra-wide gear range that delivers climbing and descending efficiency in spades. On top of this, the one-by setup is notorious for being next to impossible to drop a chain with, plus it provides a significant weight savings in comparison to a standard two-by setup.
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 trav
Rear Shock
RockShox Monarch RT3, Rx Trail Tune, AUTOSAG, rebound and 3-position compression adjust, 197x48mm
Front Fork
FOX 34 Performance 27.5, 44mm offset, 15x110mm thru-axle, 150mm of travel
Stem
Specialized Trail, 3D forged alloy, 4-bolt, 6-degree rise
Handlebars
Specialized Trail, 7050 alloy, 8-degree backsweep, 6-degree upsweep, 27mm rise, 780mm, 31.8mm clamp
Tape / Grips
Specialized Sip Grip, half-waffle, S/M: regular thickness, L/XL: XL thickness
Front Brake
SRAM Guide R, hydraulic disc, organic pads, Guide S4 4-piston caliper, 200/180mm rotor
Rear Brake
SRAM Guide R, hydraulic disc, organic pads, Guide S4 4-piston caliper, 180/160mm rotor
Rear Derailleur
SRAM GX Eagle, 12-speed
Shift Levers
SRAM GX Eagle, trigger, 12-speed
Cassette
SRAM GX Eagle, 12-speed, 10-50t
Chain
SRAM GX Eagle, 12-speed w/ PowerLock®
Crank Set
Truvativ Descendant, aluminum, Boost™ 148, 170mm crankarm, 30mm spindle
Chainrings
32T
Bottom Bracket
PF30
Pedals
Specialized Platform, Cr-Mo, 9/16" spindle
Front Rim
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
Rear Rim
Roval Traverse Carbon 27.5, hookless carbon, 30mm inner width, 24/28h, tubeless ready, hand-built
Rear Hub
Specialized, sealed cartridge bearings, 12x148mm thru-axle, 28h
Spokes
DT Swiss Industry, stainless, 3-cross, 2.0"
Front Tyre
Butcher, GRID casing, Gripton compound, 2Bliss Ready, 27.5 x 2.6"
Rear Tyre
Butcher, GRID casing, Gripton compound, 2Bliss Ready, 27.5 x 2.6"
Inner Tubes
Standard, Presta valve
Saddle
Body Geometry Henge Comp, hollow Cr-Mo rails, 143mm
Seat Post
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
Seat Clamp
Alloy, 34.9mm

Delivery Information

Hargroves Cycles offer Free Delivery for all orders over £9 with in Mainland UK (orders below £9 will be charged £1.99)

Bikes and Bulky items are sent via TNT Courier and smaller items are sent via Royal Mail 2nd Class Post.

Items over £50 are sent with Royal Mail 1st Class track able service which is emailed to the customer on the day of dispatch.
For full delivery details please see our Delivery Page

International Delivery

Hargroves Cycles delivery all across Europe. Goods are shipped from the UK and are subject to import duties where applicable

For further delivery, pricing and restriction information please view our International Shipping Page

Returns Information

We will happily exchange or refund any item purchased at Hargroves Cycles within 365 days, except gift vouchers and personalized products, except where faulty.

Returned goods must be unused and supplied with their original packaging, unless faulty.

For full details on our Returns procedure please visit out Returns Section.

Questions on Specialized Stumpjumper Expert Carbon 650B - 2018 Mountain Bike

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Hargroves Cycles have been working in partnership with Specialized Bikes since the formation of the company 25 years ago. Since then we have consistantly sold a broad range of mountain bikes, road bikes, hybrid bikes, clothing and accessories. Die hard fans of the brand will be familiar with the names Stumpjumper, Rockhopper, Hardrock, Allez and Tarmac. There arent many dealers who can claim a 25 year relationship with any brand, so if you need to know about Specialized bikes you need to talk to us.

Specialized Bikes was formed in 1974 by Mike Sinyard. In 1981 Specialized introduced the worlds first major production mountain bike - the Stumpjumper. Since then the brand has gone from strength to strength with the Rockhopper, Hardrock, FSR range, Enduro, Pitch, Tarmac, Allez, Roubaix, Transition and Langster to name but a few.