Rockhopper Comp Disc
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Rockhopper Comp Disc

Part No.  
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Rockhopper Comp Disc
Technical Specifications
FOR OVER TWO DECADES the Rockhopper has been the best hardtail for any rider looking for thrills and adventure over a wide variety of terrain. The Rockhopper's M4 alloy frame and premium specs deliver category-leading efficiency, value and dependable handling.
  • The Rockhopper Comp Disc’s M4 manipulated alloy frame is fully butted, with an ORE down tube for added strength and off-road accuracy.
  • The suspension fork features 100mm of smooth coil-sprung travel, rebound and preload adjustments, plus lockout—making this fork tunable to any need.
  • The 3D-forged alloy stem is stiff and strong and features an oversized 31.8mm bar clamp area for a solid steering connection.
  • The mechanical disc brakes are easy to adjust and maintain and give superb, controllable stopping power. The levers allow for powerful (when necessary) one-finger braking.
  • The medium cage rear derailleur gives reliable, precise gear changes.
  • The 8-speed trigger shifters offer quick shifts with the flick of a finger (or thumb).
  • The triple-chainring crankset utilizes Shimano’s Octalink-splined BB interface for highly efficient power transfer.
  • The high-volume Specialized Fast Trak LK Sport 26x2.0-inch tires have a reduced knob height for lower rolling resistance, without giving up an ounce of traction.
  • The Specialized XC saddle features Aramid side patches that hold up to rough treatment.

Technical Specifications

CHAIN KMC X8 w/ reuseable Missing Link
BOTTOM BRACKET Shimano BB-ES25, Octalink spline, cartridge bearings, 68mm x 118mm
CRANKSET Shimano FC-M36108, Octalink spline, replaceable rings
FRONT DERAILLEUR Shimano Altus, 34.9mm clamp, top swing
SHIFT LEVERS SRAM X-4, 8-speed trigger
CASSETTE SRAM PG-830-I8, 8-speed, 11-32t
CHAINRINGS 42S x 32S x 22S
FORK RockShox Dart 3 SL, 100mm, preload and rebound adj. w/ LO, 13/15"": standard spring, all others: ""stiff"" spring, disc only
FRONT HUB Specialized Hi Lo, forged alloy, double sealed, ground race, 28h
REAR HUB Specialized, forged alloy, double sealed, ground race, cassette, QR, 32h
INNER TUBES Specialized schraeder valve
SPOKES 1.8mm (15g) stainless
FRONT TIRE Specialized Fast Trak LK Sport, 26x2.0"", 60TPI, wire bead
RIMS Specialized RHD 26"", double wall disc, pinned w/ eyelets, 28/32h
REAR TIRE Specialized Fast Trak LK Sport, 26x2.0"", 60TPI, wire bead
SADDLE Specialized XC, Body Geometry, 143mm width, front and rear bumpers
SEATPOST Specialized alloy two bolt, micro adjust head, 30.9mm
STEM Specialized 3D forged, 4-bolt, 7 degree rise, 31.8mm clamp
HANDLEBARS Specialized alloy, 31.8mm, 25mm rise, 640mm wide, 8 degree back sweep, 8 degree up, 2.8mm thick
GRIPS Specialized Enduro, dual compound Kraton, no flange, 131mm
FRONT BRAKE Avid BB5, mechanical disc, caliper/adapter w/ 160mm G2 Clean Sweep rotor
BRAKE LEVERS Avid FR-5, alloy, two-finger, linear pull
REAR BRAKE Avid BB5, mechanical disc, caliper/adapter w/ 160mm G2 Clean Sweep rotor
PEDALS Steel cage, composite body, 9/16""
HEADSET Specialized 1-1/8"" threadless, loose ball
SEAT BINDER Specialized alloy w/ QR, brass washer
FRAME Specialized M4 Manipulated Alloy frame, fully butted, ORE DT, forged dropouts w/ replaceable 98954020 hanger, disc only


Geometry Chart

- Geometry

  13 15 17 19 21 23
Crank Length 170mm 170mm 175mm 175mm 175mm 175mm
Stem Length 60mm 60mm 75mm 75mm 90mm 90mm
Seatpost Length 350mm 350mm 350mm 400mm 400mm 400mm
Handlebar Width 640mm 640mm 640mm 640mm 640mm 640mm
Chainstay Length 426mm 426mm 426mm 426mm 426mm 426mm
Top Tube Length (Actual) 546mm 551mm 568mm 590mm 615mm 638mm
Top Tube Length (Horizontal) 545mm 565mm 590mm 615mm 640mm 660mm
Head Tube Angle - Low Setting 70° 70° 70° 70° 70° 70°
Standover Height 681mm 715mm 750mm 783mm 820mm 855mm
Head Tube Height 100mm 100mm 110mm 120mm 140mm 160mm
Wheel Base 1030mm 1050mm 1075mm 1101mm 1127mm 1148mm
Seat Tube Angle (Actual) - Low Setting 73° 73° 73° 73° 73° 73°
Seat Tube Length - Center to Top 330mm 381mm 432mm 483mm 533mm 584mm
Bottom Bracket Height - Low Setting 304mm 304mm 304mm 304mm 304mm 304mm