Rockhopper Expert Disc
Part No.  

Rockhopper Expert Disc

Part No.  
Rockhopper Expert 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.
  • Shimano’s Deore 9-speed rear derailleur uses a wide-link parallelogram design for increased rigidity, which means accurate shifting and long life.
  • Shimano’s Deore Rapidfire trigger shifters feature Dual Control for extra-fast shifts from thumb and/or forefinger.
  • Tektro’s Auriga Comp dual-piston hydraulic disc brakes feature smooth lever action and easy-to-control stopping power.
  • The Fast Track Control 29x2.0-inch tires feature a dual compound tread for superior traction and durability, whether you opt to go 2Bliss or not.
  • The Indie XC saddle uses our patented Body Geometry design to protect your soft parts.
  • The Rockhopper Expert Disc 29’s M4 manipulated alloy frame features our 29er-specific geometry for a lower center of gravity and increased stability. A fully butted tubeset adds to its lightweight strength.
  • The Specialized 3D-forged alloy stem is stiff and strong and features an oversized 31.8mm bar-clamp area for precise steering.
  • The front suspension features 32mm Cr-Mo stanchions and a smooth 80mm of coil-sprung travel, rebound and preload adjustments, and lockout.
  • The triple-chainring crankset features Shimano’s splined Octalink BB connection, which gives maximum power transfer and smooth pedaling action.

Technical Specifications

CHAIN KMC X9 w/ reuseable Missing Link
BOTTOM BRACKET Shimano BB-ES25, Octalink spline, cartridge bearings, 68mm x 118mm
CRANKSET Shimano FCM442, forged alloy arms, Octalink Spline w/ replaceable rings
FRONT DERAILLEUR Shimano Deore, 34.9mm clamp, bottom swing, dual pull
SHIFT LEVERS Shimano Deore SL- M531, 9-speed
CASSETTE Shimano HG-50, 9-speed, 11-34t
CHAINRINGS 44A x 32S x 22S
FORK Rock Shox Tora SLite, 100mm, alloy steerer, 32mm Cr-Mo stanchions, magnesium lower, coil spring preload and rebound adj. w/ LO, 13-15"": standard spring, all others: ""stiff"" spring w/ preload adj., 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 Control, 26x2.0"", 60TPI, aramid bead, 2Bliss ready
RIMS Specialized RHD 26"", double wall disc, pinned w/ eyelets, 28/32h
REAR TIRE Specialized Fast Trak Control, 26x2.0"", 60TPI, aramid bead, 2Bliss ready
SADDLE Specialized Indie 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 butted alloy, 31.8mm, 25mm rise, 640mm wide, 8 degree back sweep, 8 degree up, 2.6mm thick
GRIPS Specialized Enduro, dual compound Kraton, no flange, 131mm
FRONT BRAKE Tektro Auriga Comp, hydraulic disc, dual piston w/ 160mm rotor
BRAKE LEVERS Tektro Auriga Comp
REAR BRAKE Tektro Auriga Comp, hydraulic disc, dual piston w/ 160mm rotor
PEDALS Alloy body and cage, 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