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Description
The Specialized Stumpjumper ST Alloy 29 Mountain Bike has 120mm of rear end travel from a X-Fusion 02 Pro RL shock and a 130mm RockShox Recon RL fork, providing both comfort and control over rough terrain. The TransX dropper seatpost can be used on really steep descents or simply when it’s expedient to have more room to manoeuvre around the bike. SRAM’s 12-speed 1x SX Eagle drivetrain pairs an 11-50 tooth cassette with a 30 tooth chainring for a wide range of ratios operated by a simple trigger shifter. With the 2.3” Specialized Eliminator and Purgatory tyres on Specialized’s own 29” double-wall alloy wheels, the Stumpjumper ST Alloy 29 is ready to take on everything from Trail Centre blasts to all-day epics.
FRAME | Specialized M5 alloy chassis and rear end, asymmetrical design, 29 Trail Geometry, threaded BB, fully enclosed internal cable routing, 12x148mm dropouts, sealed cartridge bearing pivots, replaceable derailleur hanger, 120mm of travel |
FORK | RockShox Recon RL, Motion Control damper with low-speed compression to lockout, 51mm offset, rebound adjust, 15x110mm Boost™ Maxle® Lite thru-axle, 130mm of travel |
REAR SHOCK | X-Fusion 02 Pro RL, Rx Trail Tune, rebound adjust, lockout 190x42.5mm |
STEM | Specialized, 3D-forged alloy, 4-bolt, 7-degree rise |
HANDLEBAR | Specialized Trail, 6061 alloy, 8-degree backsweep, 6-degree upsweep, 27mm rise, 780mm, 31.8mm clamp |
GRIPS | Specialized Sip Grip, half-waffle, slip-on |
FRONT BRAKE | Tektro Gemini Comp, hydraulic disc, resin pad, 200mm rotor |
REAR BRAKE | Tektro Gemini Comp, hydraulic disc, resin pad, 180mm rotor |
BRAKE LEVERS | Tektro Gemini Comp |
FRONT DERAILLEUR | N/A |
REAR DERAILLEUR | SRAM SX Eagle, 12-speed |
SHIFT LEVERS | SRAM SX Eagle, trigger, 12-speed |
CASSETTE | SRAM PG-1210 Eagle, 12-speed 11-50t |
CRANKSET | SRAM SX Eagle, Powerspline 30t |
CHAIN | SRAM SX Eagle, 12-speed |
FRONT WHEEL | Specialized, sealed cartridge bearings, 15x110mm spacing, 32h hub with DT Swiss Industry spokes and alloy 29”, hookless alloy, 27mm inner width, tubeless-ready rim |
REAR WHEEL | Specialized, sealed cartridge bearings, 12x148mm spacing, 32h hub with DT Swiss Industry spokes and alloy 29”, hookless alloy, 27mm inner width, tubeless-ready rim |
FRONT TYRE | Specialized Eliminator, GRID TRAIL casing, GRIPTON® compound, 2Bliss Ready, 29x2.3" clincher |
REAR TYRE | Specialized Purgatory, GRID casing, 2Bliss Ready, 29x2.3" clincher |
SADDLE | Specialized Body Geometry Myth 155 S, Body Geometry Henge 143 M/L/XL, steel rails |
SEATPOST | TransX dropper, 34.9mm, S |
PEDALS | Specialized Dirt |
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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Important Update for Our Canadian Customers
We regret to inform you that shopping on Sigma Sports is temporarily unavailable for customers based in Canada.
We understand how disappointing this may be and sincerely apologize for any inconvenience caused. Please rest assured that we are actively exploring solutions to resume service and find the best way to support our Canadian community.
We appreciate your patience and understanding during this time, and we look forward to welcoming you back as soon as possible.
If you require any further assistance, please reach out to the customer services team
— The Sigma Sports Team