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.
All our bikes are fully built by our Cytech qualified mechanics. To find out more, see the Built, Checked, Tuned and Tested section below to see how we'll deliver your bike.
We offer FREE DELIVERY of your bike to your home or place of work. Once you've placed your order, our Customer Care team will be in contact to offer a convenient delivery date of your choice.
We've partnered with PedalSure to offer you 30-DAYS FREE bike insurance on new bikes over £400. Visit our Cycle Insurance page to learn more and claim.
Specialized Stumpjumper ST Comp Carbon 29" 12-Speed Mountain Bike 2019
Built around the proven top end Specialized FACT 11m carbon frame and finished with durable lightweight components, the Stumpjumper ST Comp Carbon 29" 12-speed Mountain Bike is fast across rough ground and retains nimble handling thanks to steeper geometry and slightly less travel in the FOX FLOAT front and rear suspension. Crush the flat sections, cruise the climbs and flow through the descents on this do-it-all bike.
A refreshed carbon layup redistributes the materials and features new tubes shapes so that stiffness is optimised exactly where it needs to be and weight is kept down. Improved connections between the front and rear notably improve the balance, so the handling feels instinctive, almost telepathic, and in particular a new sidearm design reduces flex when the rear shock is active.
This bike is easy to live with too thanks to easy-to-feed internal cable routing guides, a 1x SRAM NX Eagle 12-speed groupset with 11-50t cassette and a new ribbed chainstay guard that almost silences the drivetrain. Rolling on 29" Roval Traverse wheels that will hold speed and carry momentum over bumpy terrain, and will even take up to a 3.0" tyre, this is an efficient lightweight bike that delivers trail riding performance to match the best.
- Flip chip lets you slacken the geometry and lower the centre of gravity to suit your ride style
- SRAM Guide R hydraulic brakes deliver consistent braking performance no matter the conditions
- Specialized FACT 11m carbon frame is the same as the top-end S-Works model
- Internal cable routing is easy to maintain
- SRAM NX Eagle groupset is lightweight, durable and built for performance
|FRAME||Specialized FACT 11m, full carbon chassis and rear end, asymmetrical design, 29 Trail Geometry, SWAT™ Door integration, threaded BB, fully enclosed internal cable routing, 12x148mm dropouts, sealed cartridge bearing pivots, replaceable derailleur hanger, 120mm of travel|
|FORK||FOX FLOAT Rhythm 34, GRIP Damper, 51mm offset, 2-position sweep adjust, 15x110mm, tapered alloy steerer, 130mm of travel|
|REAR SHOCK||FOX FLOAT DPS Performance, Rx Trail Tune, rebound and 3-position compression adjust, 190x42.5mm|
|STEM||Specialized Trail, 3D-forged alloy, 4-bolt, 6-degree rise|
|HANDLEBAR||Specialized, 6061 alloy, 6-degree upsweep, 8-degree backsweep, 27mm rise, 780mm width|
|GRIPS||Specialized Sip Grip, half-waffle, S/M|
|FRONT BRAKE||SRAM Guide R, hydraulic disc, organic pads, Guide S4 4-piston caliper, 200mm|
|REAR BRAKE||SRAM Guide R, hydraulic disc, organic pads, Guide S4 4-piston caliper, 180mm|
|REAR DERAILLEUR||SRAM NX Eagle, 12-speed|
|SHIFT LEVERS||SRAM NX Eagle, trigger, 12-speed|
|CASSETTE||SRAM NX Eagle, 12-speed, 11-50t|
|CRANKSET||SRAM NX Eagle, DUB, 170mm, 30T chainring|
|CHAIN||SRAM NX Eagle, 12-speed|
|FRONT WHEEL||Roval Traverse 29, hookless alloy, 30mm inner width, tubeless ready, sealed cartridge bearings, 15x110mm spacing|
|REAR WHEEL||Roval Traverse 29, hookless alloy, 30mm inner width, tubeless ready, sealed cartridge bearings, 12x148mm thru-axle|
|FRONT TYRE||Specialized Butcher, GRID Casing, GRIPTON® compound, 2Bliss Ready, 29x2.3"|
|REAR TYRE||Specialized Purgatory, GRID casing, GRIPTON® compound, 2Bliss Ready, 29x2.3"|
|SADDLE||Specialized Body Geometry Phenom Comp, Adaptive Edge design, hollow Cr-Mo rails, 143mm|
|SEATPOST||Specialized X-Fusion Manic, infinite adjustable, two-bolt head, bottom mount cable routing, remote SRL LE lever, 34.9mm, 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 specified), 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.
Please note, occasionally, manufacturers may change the specification without notice. Bicycles do not come with pedals unless otherwise specified. We do not install accessories to bikes, including mudguards.
Specialized Stumpjumper ST Comp Carbon 29" 12-Speed Mountain Bike 2019 Sizing
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