Why buy your bike from Sigma Sports?
Don't hesitate to reach out to us. It's our goal to answer all of your questions and offer the best advice from our experts. We’ll be happy to answer any questions you may have. Contact us now or visit us in-store.
Save up to 47% with any one of our 11 Cycle to Work partners, and get the health benefits of a new bike in exchange for tax free salary sacrifice. To find out more about our various partners and how to apply click here.
Choose between Free Bike Delivery - to your home or place of work - or our new Premier Bike Delivery Service £99.99 and have your bike delivered "ready to ride" and set up to your measurements with seatpost and pedals adjusted on arrival by a qualified bike mechanic. Either way, our Customer Care team will be in touch to arrange a delivery date to suit you.
We've partnered with Laka to offer you 30 days free bike Insurance on your new bike purchase over £400. Click here for more info and find out how to claim.
Specialized Stumpjumper Expert Carbon 650b Disc Mountain Bike 2017
As the smaller wheeled brother to the 29er version, the Specialized Stumpjumper FSR Expert Carbon 650b 2017 is the ideal choice for any rider wanting greater control and handling over technical terrain. Holding all the same features as the 29er, just with smaller wheels, the 650b has a lightweight, strong frame, a beautiful blend of high-end components.
By using a super-lightweight FACT 9m carbon fibre frame, Specialized have been able to hugely reduce the weight of the frame which in turn aids to the overall handling and capabilities of the Stumpjumper. The rear end hosts a Stumpjumper FSR specific M5 alloy that increases strength and efficiency, keeping your rear wheel pinned for greater grip and traction.
The integrated SWAT™ door that sits behind the bottle cage on the downtube allows you to store tools, pumps and even sandwiches inside the frame. This cut-out doesn’t compromise rigidity of the frame thanks to the reinforced carbon fibre layup around the bottom bracket, keeping the Stumpjumper as efficient as it has always been.
A RockShox Pike RC front fork with 150mm of travel absorbs every big hit and impact that lays in your path, keeping your control at optimum levels and enhancing confidence on rocky/rooty sections at an all time high. The RockShox Monarch RT3 rear shock features rebound and compression adjustment, allowing you to perfect the customisation of your bike to keep your rear end completely planted.
SRAM Guide R hydraulic disc brakes are the ideal brakes to incorporate on a bike of this nature. These brakes increase stopping power, control, reliability and heat modulation ten fold through their rotors and perform as well in the wet as they do in the dry - ensuring you’ll never just be a fair-weather mountain biker.
Specialized have instilled their confidence in SRAM’s X1 rear derailleur to provide all the spin for steep climbs and power for surging along the flats. This wide range of gearing is controlled by SRAM’s GX shift levers and a RaceFace Aeffect crankset that can take rock strikes with ease and keep your power transfer incredibly efficient.
The Roval Traverse 650 wheels offer great strength and endurance without any flex. The Specialized Butcher and Slaughter GRID 650 x 2.3” tyres keep these wheels on the floor, giving enhanced grip and control, alongside puncture resistance, for a more handling-orientated and reliable ride.
Finished with a Specialized Command Post IRcc dropper post - you’ll be able to chop and change your position on the bike at a moment's notice.
Features
- 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
- RockShox Pike RC 650 fork features a 15mm Maxle Stealth thru-axle and 150mm of plush travel to take on big hits and bumpy terrain with supreme confidence and efficiency
- Roval Traverse 2Bliss Ready wheels provide a strong, stable platform that's built to deliver heaps of responsiveness, speed, and supreme handling
Image shown for representation of colourway only, specification subject to change at any time. Bicycles do not come with pedals unless otherwise specified.
Technical Specification
| FRAME | Specialized FACT 9m, carbon front chassis, M5 alloy rear end, Trail Geometry, SWAT™ Door integration, PF30 BB, fully enclosed internal cable routing, ManFu link, 12x148mm dropouts, sealed cartridge bearing pivots, replaceable derailleur hanger, 150mm of travel |
| FORK | RockShox Pike RC 27.5, Solo Air, compression and rebound adjust, tapered steerer, 15x110mm Maxle Stealth thru-axle, 46mm offset, 150mm travel |
| REAR SHOCK | RockShox Monarch RT3, Rx Trail Tune, AUTOSAG, rebound and 3-position compression adjust, 197x48mm |
| STEM | Specialized Trail, 3D forged alloy, 4-bolt, 6-degree rise |
| HANDLEBARS | Specialized Trail, 7050 alloy, 8-degree backsweep, 6-degree upsweep, 25mm rise, 750mm width, 31.8mm |
| 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 |
| BRAKE LEVERS | SRAM GX, 11-speed, trigger |
| FRONT DERAILLEUR | N/A |
| REAR DERAILLEUR | SRAM X1 Type 2.1, 11-speed |
| SHIFT LEVERS | SRAM GX, 11-speed, trigger |
| CASSETTE | SRAM XG-1150, 11-speed, 10-42t |
| CRANKSET | RaceFace Aeffect, 6000-series alloy, 24mm spindle, 52mm chainline |
| FRONT WHEEL | Roval Traverse 650, hookless alloy, 29mm inner width, 24/28h, tubeless ready |
| REAR WHEEL | Roval Traverse 650, hookless alloy, 29mm inner width, 24/28h, tubeless ready |
| FRONT TYRE | Specialized Butcher, GRID casing, 650x2.3", 60TPI, Aramid folding bead, 2Bliss Ready |
| REAR TYRE | Specialized Slaughter, GRID casing, 650x2.3", 60TPI, Aramid folding bead, 2Bliss Ready |
| SADDLE | Specialized Body Geometry Henge Comp, hollow Cr-Mo rails, 143mm |
| SEATPOST | Specialized Command Post IRcc, 12 position micro-height adjustable, alien head design, bottom mount cable routing, remote SRL lever, 30.9mm, S |
Built, Checked, Tuned and Tested
All our bikes are fully built, checked, tuned and tested by our Cytech qualified mechanics and then securely packaged, ready for delivery. All you have to do is add the pedals (if included), attach the handlebars to the stem and tighten them following the included detailed instructions or by watching our video and using the provided FREE tools. Visit our Bike Assembly page to see how you assemble your new bike once you receive it.
All bikes collected from our shop, are built, tested and ready to ride. For hassle-free home delivery and bike set-up from a qualified mechanic use our Premier Delivery Service.
Please note, occasionally, manufacturers may change the specification without notice. Bicycles do not come with pedals unless otherwise specified. Bikes ordered for delivery will not arrive with the pedals installed, please refer to the owners manual and pedal installation guides provided for guidance. We do not install accessories to bikes, including mudguards. Bikes ordered for delivery that have tubeless compatible tyres and rims will arrive with inner tubes installed or with tubeless valves installed, this will be brand dependent. Sealant is available to be purchased separately.
If you require any assistance please contact our Customer Care team.
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