2021 Specialized Rockhopper Sport 27.5

The 2021 Specialized Rockhopper Sport 27.5 is a 27.5″ aluminum frame hardtail crosscountry bike with modest components.

View on www.specialized.com

2021 Specialized Rockhopper Sport 27.5
  • MSRP $600
  • Front Travel 100mm
  • Frame Aluminum
  • Fork SunTour XCM
  • Wheels 27.5″
  • Tires 2.3"
  • Drivetrain 2 × 9
  • Groupset Altus
  • Brakes Hydraulic Disc

Where to Buy


2 × 9 — 18 speed

2021 Specialized Rockhopper Sport 27.5
27 mph
Similar Bikes
27 mph

The Rockhopper Sport 27.5 is easier to ride up hills than similar bikes.

The Rockhopper Sport 27.5 is geared about the same as similar bikes for riding downhill.

Estimated Spec Level

Estimated spec level of the Rockhopper Sport 27.5 compared to other crosscountry bikes. 99 Spokes analyzes the build material and quality level of the frame, fork, wheelset, groupset, suspension system, and more to estimate the overall spec level of each bike.

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est. spec level →$0$200$400$600$800$1,000
This bike
Other crosscountry bikes



FrameA1 premium butted alloy, zero-stack head tube, internal cable routing, 135x9mm forged dropouts, chainstay-mounted disc brake, replaceable alloy derailleur hanger, stealth rack mounts, dropper post compatible
ForkSR Suntour XCM 27.5, 30mm stanchions, Rx Tune, coil spring, QR, 80/90/100mm travel (size-specific), 42mm offset
Bottom BracketSquare-tapered, 73mm, internal bearings, 122.5mm spindle
StemStout 3D-forged alloy, 31.8mm, 6-degree rise
HandlebarStout Mini Rise, alloy, 9-degree backsweep, 15mm rise, 31.8mm
SaddleBridge Sport, Steel rails, 155/143mm
SeatpostAlloy, 12mm offset, 2-bolt clamp, 30.9mm
GripsSpecialized Trail Grips, lock-on
Rear DerailleurShimano Altus, RD-M2000, 9-speed
Front DerailleurShimano Altus FD-M2020 2-speed
CrankStout 2x, forged alloy, 22/36T
ShiftersShimano Altus, RapidFire Plus, 9-speed
CassetteSunRace, 9-Speed, 11-36t
ChainKMC X9EPT, 9-speed, anti-corrosion coating w/ reusable Missing Link™
BrakesTektro HD-M275, hydraulic disc, 180/160mm
RimsSpecialized alloy, disc only, double-wall, 25mm inner width, 32h
SpokesStainless, 14g
Front HubFormula 6-Bolt, disc, 100x9mm spacing, quick-release, 32H
Rear HubFormula 6-Bolt freehub, disc, 135x9mm spacing, quick-release, 32H
TiresGround Control Sport, 27.5x2.3"
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2021 Specialized Rockhopper Sport 27.5