Men's Stumpjumper ST 29
Part No.:  

Men's Stumpjumper ST 29

Part No.:  
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Men's Stumpjumper ST 29
Overview
Technical Specifications
Geometry

The new Stumpjumper ST uses new tube shapes and an asymmetrical design to ensure that you get awesome ride characteristics. So get ready, because the Stumpjumper ST Alloy 29 is sure to exceed your expectations of how a trail bike should ride.

Our design goal for the new Stumpjumper was simple—build the ultimate trail bike, one that feels telepathic. And it turns out that this feeling all comes down to stiffness. Think of it this way: when the frame's telling your hands one thing and your feet another, your brain gets confused with the imbalance and the bike feels unstable. In order to fix this, we had to get to work on dialing-in the materials and shapes.

We continued down the suspension path with a custom Rx Trail Tune on both the fork and rear shock. Suspension performance is highly dependent on frame, wheel, and rider size, so we use our Rx Tune to get each bike to land in the middle of the adjustment spectrum, and this gives you the biggest possible range to fine-tune your ride. Another focal point of the tune was matching the suspension characteristics between wheel sizes—we developed a specific Rx Tune for each platform. So, no matter what wheel size you prefer, you'll get perfectly linear suspension.

Steps were also taken to make this bike easy to live with. Threaded bottom brackets make a triumphant return, and we made room for up to a 3.0' tire. You're also free to run whatever aftermarket rear shock you want, since we're using standard metric shocks. And customization is furthered with a Flip Chip that lets you to dial-in your Stumpy to your riding style. Switch it from High to Low and it drops your bottom bracket 6mm and slackens the head tube by half-a-degree. Little details also jump out to surprise you, like a newly designed ribbed chainstay protector that makes chain slap a thing of the past and nearly silences the drivetrain.

The build here is no-nonsense with a focus on dependable, high-performing parts, like Shimano SLX front and rear derailleurs, Tektro Gemini disc brakes, a RockShox Recon RL fork with 130mm of travel, a custom X-Fusion 02 Pro RL rear shock with 120mm of travel, and wide alloy wheels.

  • The all-new alloy Stumpjumper ST frame features an M5 alloy front- and rear-end, an asymmetrical design, and our 29 Trail Geometry, so it's both capable and comfortable.
  • The X-Fusion Metric rear shock features rebound adjustment, lockout, and our coveted Rx Trail Tune to ensure you're getting the most out of your Stumpjumper ST.
  • A RockShox Recon RL provides 130mm of travel up front, and it lets you adjust both rebound and lockout.

Technical Specifications

DRIVETRAIN
BOTTOM BRACKET SRAM Powerspline
CHAIN KMC X11, 11-speed w/ Missing Link™
CRANKSET SRAM NX, Boost™, direct-mount XSYNC, Powerspline
SHIFT LEVERS Shimano SLX, 11-speed
CASSETTE SunRace, 11-speed, 11-46t
CHAINRINGS Steel, 30T
REAR DERAILLEUR Shimano SLX, Shadow Plus, 11-speed
SUSPENSION
FORK RockShox Recon RL, Solo Air, 51mm offset, rebound adjust, lockout, 15x110mm Boost™ Maxle® Lite thru-axle, 130mm of travel
REAR SHOCK X-Fusion 02 Pro RL, Rx Trail Tune, rebound adjust, lockout 190x42.5mm
COCKPIT
SADDLE Body Geometry Henge Sport, steel rails, 143mm
SEAT BINDER Alloy, 38.6mm
SEATPOST Specialized 2-bolt head, forged alloy, 5mm offset, micro-adjust, 34.9mm
HANDLEBARS Specialized, 6061 alloy, 6-degree upsweep, 8-degree backsweep, 27mm rise, 780mm width
STEM Specialized, 3D-forged alloy, 4-bolt, 7-degree rise
GRIPS Specialized Sip Grip, half-waffle, slip-on
WHEELS & TIRES
FRONT HUB Specialized, sealed cartridge bearings, 15x110mm spacing, 32h
REAR HUB Specialized, sealed cartridge bearings, 12x148mm thru-axle, 32h
INNER TUBES Standard, Presta valve
SPOKES Stainless, 14g
RIMS Double-wall, 27mm internal width
FRONT TIRE Butcher, GRID Casing, GRIPTON® compound, 2Bliss Ready, 29x2.3"
REAR TIRE Purgatory, GRID casing, GRIPTON® compound, 2Bliss Ready, 29x2.3"
BRAKES
FRONT BRAKE Tektro Gemini Comp, hydraulic disc, resin pad, 200mm
REAR BRAKE Tektro Gemini Comp, hydraulic disc, resin pad, 180mm
ACCESSORIES
PEDALS Specialized Dirt
FRAMESET
FRAME 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
The All-New Stumpjumper
The All-New Stumpjumper

Geometry

Geometry Chart

Stumpjumper ST - Geometry

S M L XL
  S M L XL
Crank Length 170MM 170MM 170MM 170MM
Stem Length 50MM 50MM 50MM 50MM
Seatpost Length 375mm 375mm 435mm 435mm
Saddle Width 143mm 143mm 143mm 143mm
Handlebar Width 780mm 780mm 780mm 780mm
Reach 415mm 435mm 455mm 480mm
Top Tube Length, Horizontal 570mm 593mm 624mm 657mm
Stack 612mm 612mm 635mm 649mm
Wheelbase 1143mm 1163mm 1192mm 1223mm
Chainstay Length 437mm 437mm 437mm 437mm
Front Center 708mm 728mm 758mm 789mm
BB Drop 39mm 39mm 39mm 39mm
BB Height 333mm 333mm 333mm 333mm
Seat Tube Angle 75.8° 75.5° 75.1° 74.7°
Head Tube Angle 67.5° 67.5° 67.5° 67.5°
Seat Tube Length 380mm 410mm 455mm 505mm
Head Tube Length 100mm 100mm 125mm 140mm
Bike Standover Height 750mm 756mm 769mm 770mm
Fork Rake/Offset 51mm 51mm 51mm 51mm
Fork Length, Full 540mm 540mm 540mm 540mm
Trail 99mm 99mm 99mm 99mm