Specialized Stumpjumper ST Alloy 27.5 2020

The new women's 2019 Specialized Stumpjumper ST 27.5 comes as an alloy version, and it may be the most radically designed alloy bike ever made. And with new tube shapes, an asymmetrical design, and the snappy handling that the 27.5 platform is known for, this bike is sure to exceed your expectations of how a trail bike should ride. Specialized's 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, Specialized had to get to work on dialing-in the materials, shapes, and the layout. They continued down the suspension path with a Women's Rx Tune that gives both the fork and rear shock a custom tune specifically for female riders. Suspension performance is highly dependent on frame, wheel, and rider size, so Specialized used their Women's 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 - Specialized developed a specific Rx Tune for each platform and rider size. So, no matter what, 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 they made room for up to a 3.0" tire. You're also free to run whatever aftermarket rear shock you want, since Specialized is 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 130mm of travel, and wide alloy wheels.

• Suggested Use
  • All-Mountain/Trail, XC Mountain Biking
• Frame
  • 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
• Rear Shock
  • X-Fusion 02 Pro RL, Women's Rx Tune, rebound adjust, lockout, 190x45.0mm
• Fork
  • RockShox Recon RL, Solo Air, 42mm offset, rebound adjust, lockout, 15x110mm Boost™ Maxle® Lite thru-axle, 130mm of travel
• Handlebars
  • Specialized, 6061 alloy, 6-degree upsweep, 8-degree backsweep, 27mm rise, 750mm width
• Brakes
  • Tektro Gemini Comp, hydraulic disc, resin pad, 180/200mm Front Rotor and 180mm Rear Rotor
• Front Derailleur
  • N/A
• Rear Derailleur
  • Shimano SLX, Shadow Plus, GS cage, 11-speed
• Shift Levers
  • Shimano SLX, 11-speed
• Crankset
  • SRAM NX Power Spline, aluminum, Boost™ 148, XS: 165mm crankarms, SM-LG: 170mm crankarms
• Bottom Bracket
  • SRAM Power Spline
• Chain
  • KMC X11, 11-speed w/ Missing Link™
• Cassette
  • Sunrace, ED Black, 11-speed, 11-46t
• Wheels
  • Double-wall, 27mm internal width, 32H
• Tires
  • Butcher, GRID Casing, GRIPTON® compound, 2Bliss Ready, 27.5 x 2.3" Front Tire, Purgatory, GRID casing, GRIPTON® compound, 2Bliss Ready, 27.5 x 2.3" Rear Tire
• Saddle
  • Body Geometry Myth Sport, steel rails, 155mm
• Seatpost
  • Alloy, two-bolt clamp, 34.9mm
• Weight:
  • N/A

*Specifications are subject to change without notice