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 ST Alloy Womens 27.5" MTB
The new Specialized Stumpjumper ST Alloy Women's 27.5" Mountain Bike reinvents alloy frame design to be one of the most striking and capable trail bikes you can buy, and at an accessible price point. Characterised by the typically willing handling of the 27.5" wheel platform, and complemented by Specialized's unique 27.5 Trail Geometry, this bike uses trusted, high-performance parts with cleverly integrated customisable features to create a fully bespoke ride experience.
Key to developing a bike that felt natural on the trails, that would glide through the turns without feeling edgy or cumbersome, was to focus on stiffness that would remove imbalance between the hands and feet. Consequently, the bike features new tube shapes and an asymmetrical design, and the suspension characteristics are specifically dialled in using an Rx Tune that's tailored for the 27.5" ride.
Customisation to suit your ride style centres around the innovative Flip Chip that lets you drop the bottom bracket by 6mm and slackens the head tube by half a degree, for pinning the bike deep into the berms. Dependable parts include the Shimano SLX rear derailleur, Tektro Gemini disc brakes and RockShox Recon RL fork, and for ease of maintenance, the bottom bracket is threaded.
Features
- M5 alloy front- and rear-end, an asymmetrical design, and 27.5 Trail Geometry, so it's both capable and comfortable
- The X-Fusion Metric rear shock features rebound adjustment, lockout, and the coveted Women's Rx Tune to ensure you're getting the most out of your ride
- A RockShox Recon RL provides 130mm of travel up front, and it lets you adjust both rebound and lockout
Technical Specification
FRAME | Specialized M5 alloy chassis and rear end, asymmetrical design, 27.5 Trail Geometry, threaded BB, fully enclosed internal cable routing, 12x148mm dropouts, sealed cartridge bearing pivots, replaceable derailleur hanger, 130mm of travel |
FORK | RockShox Recon RL, Solo Air, 42mm offset, rebound adjust, lockout, 15x110mm Boost™ Maxle® Lite thru-axle, 130mm of travel |
REAR SHOCK | X-Fusion 02 Pro RL, Women's Rx Tune, rebound adjust, lockout, 190x45.0mm |
HANDLEBAR | Specialized Trail, 6061 alloy, 8-degree backsweep, 6-degree upsweep, 27mm rise, 750mm, 31.8mm clamp |
FRONT BRAKE | Tektro Gemini Comp, hydraulic disc, resin pad, 200mm |
REAR BRAKE | Tektro Gemini Comp, hydraulic disc, resin pad, 180mm |
FRONT DERAILLEUR | N/A |
REAR DERAILLEUR | Shimano SLX, Shadow Plus, 11-speed |
SHIFT LEVERS | Shimano SLX, 11-speed |
CASSETTE | SunRace, 11-speed, 11-46t |
CHAIN | KMC X11, 11-speed with Missing Link™ |
CRANKSET | SRAM NX, Boost™, direct-mount XSYNC, Powerspline |
BOTTOM BRACKET | SRAM Powerspline |
CHAINRINGS | SRAM, Steel, 32T |
PEDALS | Specialized Dirt |
RIMS | Double-wall, 27mm internal-width |
FRONT HUB | Specialized, sealed cartridge bearings, 15x110mm spacing, 32h |
REAR HUB | Specialized, sealed cartridge bearings, 12x148mm thru-axle, 32h |
FRONT TYRE | Specialized Butcher, GRID Casing, GRIPTON® compound, 2Bliss Ready, 27.5 x 2.3" |
REAR TYRE | Specialized Purgatory, GRID casing, GRIPTON® compound, 2Bliss Ready, 27.5 x 2.3" |
SADDLE | Specialized Body Geometry Myth Sport, steel rails, 155mm |
SEATPOST | Specialized 2-bolt head, forged alloy, 5mm offset, micro-adjust, 34.9mm |
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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