Technical Specifications

Description
Stumpjumper 15 Alloy is here to obliterate every trade-off in the trail game. Devour bumps like a big bike? Check. Short-travel control, playfulness, and efficiency? Double check. How about a heaping helping of personalization to make it perfect for the only rider who really matters—you? Check, check, check. KINEMATICS PERFECTED: As the quintessential trail bike, Stumpjumper 15 Alloy balances efficiency and optimal bump force management. For the anti-squat on Stumpjumper 15 Alloy, we struck a balance between the previous Stumpjumper and Stumpjumper EVO, as both had excellent pedaling characteristics. HONED GEOMETRY: This bike’s geometry delivers big bike capability when you need it, a nimble feel in tight sections, and lively, efficient climbing manners. The generous cockpit centers you on the bike, optimizing traction and corner control. The low bottom bracket, slack head tube angle, and optimized fork offset keep things stable in the rough. RIDE YOUR WAY: The Stumpjumper 15 Alloy seamlessly integrates benchmark geo adjustability, making it the most personalizable trail bike ever. Six distinct geometry settings allow you to hone performance for any style and any terrain. The head angle and bottom bracket can be fine-tuned for stability or clearance. FORM FOLLOWS FUN: We can make a frame as stiff as we want, but there’s such a thing as too stiff. To be one with the bike requires engineered compliance in the frame. We engineered the M5 Alloy chassis—front end, rear end, and the link between them—as a single unit that hits the stiffness target we established for trail riding. WHEEL SIZE: All coil-sprung models come with mixed wheels. WHEEL CHOICE: With our aftermarket link shock links, you can choose between big wheels front and rear or mix things up with a 27.5” rear for a more responsive and playful ride. No matter what you choose, geometry is unaffected. CARRY IT ALL: SWAT on Stumpjumper 15 elevates downtube storage, an innovation we pioneered. MORE RELENTLESS THAN YOU: Our full-suspension bikes are built to be relentless, designed to endure years of hard riding, and backed by the best support and programs to keep you on the trail. Our unbeatable lifetime, no-questions-asked replacement suspension pivot bearings to the original owner is just one way we've got you covered. All-new M5 alloy frame with SWAT door integration

Ride Dynamics tuned X-Fusion 02 Pro RL shock with adjustable rebound and lockout

RockShox Psylo Silver fork with Motion Control Damper

Reliable Shimano MT-420 4-piston brakes

12-speed Shimano Deore drivetrain

Lifetime replacement of suspension pivot bearings to the original owner







Frameset

Frame M5 Alloy chassis and rear-end, Trail Geometry, SWAT™ Door integration, head tube angle adjustment, threaded BB, internal cable routing, 12x148mm dropouts, sealed cartridge bearing pivots, SRAM UDH compatible, 145mm of travel

Seat Binder Alloy, 38.6mm

SWAT SWAT internal downtube storage

Suspension

Fork RockShox, Psylo Silver, Motion Control Damper, 15x110 axle, 44mm offset, S1:140mm of travel, S2-S6:150mm of travel

Cockpit

Seat Post TranzX Dropper, remote SLR LE lever, 34.9, S1: 125mm, S2: 150mm, S3: 170mm, S4-S6: 200mm

Saddle Bridge, Steel rails, S1-S2: 155mm, S3-S6: 143mm

Stem Alloy Trail Stem, 35mm bar bore

GripsSpecialized Trail Grips

Handlebars Specialized, 6000 series alloy, 6-degree upsweep, 8-degree backsweep. S1-S2: 780 width, 20mm rise: S3-S4: 800 width, 30mm rise: S5-S6: 800 width, 40mm rise

Brakes

Front Brake Shimano, BR-MT420, 4-piston caliper, hydraulic disc, 203mm

Rear Brake Shimano, BR-MT420, 4-piston caliper, hydraulic disc, S1-S2: 180mm, S3-S6: 203mm

Drivetrain

Shift Levers Shimano Deore, M6100, 12spd

Rear Derailleur Shimano Deore, M6100, 12pd, Shadow Plus

Cassette Shimano Deore, M6100, 12spd w/Hyperglide+, 10-51t

Crankset Shimano Deore, M6120, 30T ring, 55mm chainline, S1-S3:165mm, S4-S6: 170mm

Chain Shimano Deore, M6100, 12-speed

Wheels & Tyres

Front Hub Alloy, sealed cartridge bearings, 15x110mm thru-axle, 28h

Rear hub Alloy, sealed cartridge bearings, 12x148mm thru-axle, 28h

Butcher, GRID TRAIL casing, GRIPTON® T9 compound, 2Bliss Ready, 29x2.3" Butcher, GRID TRAIL casing, GRIPTON® T9 compound, 2Bliss Ready, 29x2.3"

Eliminator, GRID TRAIL casing, GRIPTON® T7 compound, 2Bliss Ready, S1-S2: 27.5x2.3, S3- S6: 29x2.3" Eliminator, GRID TRAIL casing, GRIPTON® T7 compound, 2Bliss Ready, S1-S2: 27.5x2.3, S3- S6: 29x2.3"

Spokes Stainless, 14g

Tubes Standard, Presta valve

Accessories

FAQs

Please read our FAQs page to find out more.

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What is included with a new bike purchase?

Every new bike purchase includes a basic setup so you are comfortable and ready to ride. We adjust your saddle height and make sure you can reach your brakes and shifters with ease.

What does Online Exclusive mean?

Online Exclusive items are not stocked on our showroom floor. They are ordered in from our supplier once you place your order and usually arrive within 7 days.

When will my bike be ready for pickup or delivery?

Once your bike arrives, our mechanics build and safety check it. We will notify you as soon as it is ready for pickup or prepared for home delivery.

Is the bike fully assembled?

Yes. All bikes are fully built, tuned and safety checked by our qualified mechanics before you receive them.

Do you offer delivery for bikes?

Yes. After your bike has been built and prepared, we can arrange home delivery. Courier fees vary depending on your location.

Can I book a bike fit?

Yes. We offer Retül Fit and Basic Fit services. Contact our showroom to book a session or visit this page to find out more about our fit services.