Specialized Rockhopper 27.5" Bike (2025)

Specialized Rockhopper Base KH 27.5" Mountain Bike in Purple from 2025. Specialized reference: 91525-7401

Better performance. Better value. Better Rockhopper. By taking advantage of the fit and handling benefits of matching each rider to their ideal wheel size and suspension that works at its best for everyone thanks to our size-specific Rx Tune, we've packed extra performance into the Rockhopper without increasing the price.

• The crisp, reliable Shimano drivetrain provides a robust 2x9 drivetrain that can handle anything you throw at it, while the confident braking of Shimano hydraulic disc brakes seals the deal of the century.
• A heart of gold, presented in our lightweight yet durable A1 Premium aluminum, the Rockhopper's butted aluminum frame features hydroformed top and down tubes to keep weight down and strength up, all while providing increased clearance. axles, sleek internal cable routing, and dropper post compatibility.
• To ensure the Rockhopper offers both the best fit and performance for every individual, no matter their size, we've matched each Rockhopper frame size to the optimal wheel size. The result is a Rockhopper that fits every rider and the confidence that every Rockhopper rolls on the best handling wheel for their frame size.
• Bringing our Rx Tune to the Rockhopper for the first time, 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 ensuring consistent geometry, handling and suspension performance regardless of frame or wheel size.
• Combine Formula's trusted hubs with our 25-millimeter internal diameter rims for a wheel triplet: strong, lightweight and durable.

Tech Specs

Frameset

• FRAME: Specialized 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
• HUG. SADDLE: Alloy, 34.9mm

Cockpit

• STEAM: Stout 3D-forged alloy, 31.8mm, 6-degree rise
• HANDLEBAR: Alloy Mini Rise, 9-degree backsweep, 15mm rise, 31.8mm
• GRIPS: Specialized Trail Grips, lock-on
• SADDLE: Bridge Sport, Steel rails, 155/143mm
• SEATPOST: Alloy, 2-bolt clamp, 30.9mm

Suspension

• FORK: SR Suntour XCM 27.5, 30mm stanchions, Rx Tune, coil spring, QR, 80/90/100mm travel (size-specific), 42mm offset

Brakes

• FRONT BRAKE:Shimano BR-MT200, hydraulic disc, 180mm
• REAR BRAKE: Shimano BR-MT200, hydraulic disc, 180mm

Drivetrain

• Bottom Bracket: Square-tapered, 73mm, internal bearings, 122.5mm spindle
• GEAR CONTROLS: Shimano Altus, RapidFire Plus, 9-speed
• GEAR: SHIMANO SHADOW RD-M2000 9-spd
• CASSETTE: SunRace, 9-Speed, 11-36t
• CHAIN: KMC X9EPT, 9-speed, anti-corrosion coating w/ reusable Missing Link™
• PEDALIER: Stout 2x, forged alloy

Wheels & Tires

• RIMS: Specialized alloy, disc only, double-wall, 25mm inner width, 32h
• FRONT HUB: Formula 6-Bolt, disc, 100x9mm spacing, quick-release, 32H
• REAR HUB: Formula SP-2125, 6-Bolt freehub, disc, 135x9mm spacing, quick-release
• SPOKES: Stainless, 14g
• FRONT TIRE: Fast Trak Sport, 27.5/29x2.35
• REAR TIRE: Fast Trak Sport, 27.5/29x2.35
• CAMERAS: 
• Standard 40mm SV 650B/29x1.75-2.4

Weight

• DYNAMO:13.87kg (30 lb, 9.2 oz)