A summer blockbuster with an eye for adventure, the 2021 Specialized Rockhopper Comp 27.5 Inch Hard Tail Mountain Bike lives for high action and fast-paced plot twists and features an all-new, Premium A1 Aluminum frame making its singletrack debut. Roll the credits to discover an SR SunTour XCM fork with a custom two-way damping circuit, Stout wheelset, Shimano MT-200 hydraulic stoppers and MicroSHIFT's wide-range 1x9 drivetrain and you have backup provided by a supporting cast that's all thriller and no filler, but will never leave you hanging.

A heart of gold, presented in our lightweight yet durable Premium A1 Aluminum, the Rockhopper features butted aluminum tubes in order to keep weight low and strength high, all while providing increased standover clearance, slick internal cable routing and dropper-post compatibility. With the goal of making sure that the Rockhopper offers both the best fit and best performance for every person, no matter their measure, Specialized paired each Rockhopper frame size with the optimal wheel size. The result is a Rockhopper to fit every rider and the assurance that every Rockhopper is rolling on the best-handling wheel for its frame size.
With Rx Tune on Rockhopper, the lockout-equipped SR Suntour XCM with custom Multi-Circuit damping brings size-specific travel and spring rates to the show in a performance that’s sure to impress while also ensuring consistent geometry, handling and suspension performance, regardless of frame or wheel size.
Beautifully beastly, Shimano MT200 hydraulic disc brakes pack a mean bite but deliver their power with a refined, intuitive feel to make for a package that punches way above its pay grade.
Keep things simple with a durable 1x MicroSHIFT drivetrain that offers plenty of range along with a clutch-equipped rear derailleur that keeps your ride quite—and your chain on.
Pair dead-reliable hubs from Shimano with our 25-millimeter internal diameter, hookless Stout rims for a wheelset hat-trick: strong, light and durable.

Frame	A1 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
Fork	SR Suntour XCM 27.5, 30mm Stanchions, Rx Tune, coil spring, custom Multi-Circuit damping w/lockout, QR, 80/90/100mm travel (size-specific), 42mm offset
Shifters	microSHIFT Advent, 9-speed
Rear Derailleur	microSHIFT Advent, 1x9 w/ clutch
Brakes	Tektro HD-M275 Brakes, Tektro TR-160/180 Rotors
Cranks	Stout 1x, forged alloy - 30t
Cassette	microSHIFT Advent, 9-speed, 11-42t
Bottom Bracket	Square-tapered, 73mm, internal bearings, 122.5mm spindle
Chain	KMC X9EPT, 9-speed, anti-corrosion coating w/ reusable Missing Link
Hubs	Shimano HB-TX505, Center Lock disc, 9x100mm spacing, quick-release, 28h / Shimano FH-TX505, Center Lock disc, 9x135mm spacing, quick-release, 32h
Spokes	Stainless, 14g
Rims	Stout Alloy, hookless, pinned, disc only, double-wall, 25mm inner width, 28h
Tires	Ground Control Sport, 27.5x2.3"
Pedals	Specialized Dirt
Stem	Stout 3D-forged alloy, 31.8mm, 6-degree rise
Handlebars	Stout Mini Rise, alloy, 9-degree backsweep, 15mm rise, 31.8mm
Grips	Specialized Trail Grips, lock-on
Saddle	Bridge Sport, Steel rails, 155/143mm
Seat Post	Alloy, 12mm offset, 2-bolt clamp, 30.9mm
Seat Binder	Alloy, quick release, 34.9

*Specifications are subject to change without notice

Specialized 2021 Rockhopper Comp 27.5 Inch Hard Tail Mountain Bike