Specialized Stumpjumper Alloy 2021


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The Stumpjumper Alloy brings all-new suspension kinematics and progressive geometry into a full-alloy package that's both lightweight and extremely durable. Outfitted with a no-fuss SRAM SX 12-speed groupset, the Stumpjumper Alloy is your all-access pass for trail adventure.

  • FRAME: Alloy chassis and rear-end, asymmetrical design, 29 Trail Geometry, horst pivot BB adjustment, threaded BB, 12x148mm dropouts, sealed cartridge bearing pivots, replaceable derailleur hanger, 130mm of travel
  • REAR SHOCK: X-Fusion 02 Pro RL, Rx Trail Tune, rebound adjust, lockout S1:190x42.5mm, S2-S6: 190x45mm
  • FORK: RockShox 35 Silver, Solo Air, 44mm offset, rebound adjust, TurnKey lockout, 15x110mm Boost™ Maxle® Lite thru-axle, 140mm of travel
  • STEM: Alloy Trail Stem, 35mm bar bore
  • HANDLEBARS: Specialized, 6061 alloy, 6-degree upsweep, 8-degree backsweep, 30mm rise, 800mm width
  • TAPE: Specialized Trail Grips
  • FRONT BRAKE: Tektro Gemini Comp, hydraulic disc, resin pad, 200mm
  • REAR BRAKE: Tektro Gemini Comp, hydraulic disc, resin pad, 180mm
  • REAR DERAILLEUR: SRAM SX Eagle, 12-speed
  • SHIFT LEVERS: SRAM SX Eagle, trigger, 12-speed
  • CASSETTE: SRAM PG-1210 Eagle, 11-50t
  • CHAIN: SRAM SX Eagle, 12-speed
  • CRANKSET: SRAM SX Eagle, DUB, S1:165mm, S2-S5: 170mm, S6: 175mm
  • CHAINRINGS: Steel, 30t
  • BOTTOM BRACKET: SRAM Powerspline
  • RIMS: Roval 29, hookless alloy, 30mm inner width, tubeless ready
  • FRONT HUB: Alloy, sealed cartridge bearings, 15x110mm thru-axle, 28h
  • REAR HUB: Alloy, sealed cartridge bearings, 12x148mm thru-axle, 28h
  • FRONT TIRE: Butcher, GRID casing, GRIPTON® compound, 29x2.3"
  • SPOKES: Stainless, 14g
  • REAR TIRE: Purgatory, GRID Casing, GRIPTON® compound, 29x2.3"
  • INNER TUBES: Standard, Presta valve
  • SEATPOST: TranzX dropper, 34.9mm, S1: 100mm, S2: 125mm, S3: 150mm. S4-S5: 170mm, S6- 200mm
  • SADDLE: Body Geometry Bridge Saddle, steel rails
  • SEAT BINDER: Alloy, 38.6