Bike Comparison
    MSRP
    Where to Buy
    $1

    At

    Category
    Crosscountry
    2.4
    Aluminum
    Fork
    Suntour
    Wheels
    Aluminum
    27.5″
    Brakes
    Mechanical Disc
    Groupset
    Tourney, Shimano
    Drivetrain
    3 × 7
    Suspension
    Hardtail
    Front Travel
    75mm
    Brand Site

    specialized.com

    Summary
    The Specialized Hardrock Disc 650b is a 27.5″ aluminum frame hardtail crosscountry bike with mid-range components and mechanical disc brakes.
    Similar Bikes
    Accessories
    Gear Range

    A bike with lower gearing will be easier to ride up steep hills, while a higher top end means it will pedal faster down hills.

    Lowest gear

    (climbing)

    31 mph

    Hardrock Disc 650b

    Highest gear

    (descending)

    Geometry
    Specs
    Frame

    Specialized A1 Premium Aluminum, Sport Trail 650b Geometry, ORE down tube, externally relieved head tube, forged dropouts w/ reinforced disc mount, replaceable alloy derailleur hanger

    Fork

    SR Suntour M3030 650b, custom coil/MCU spring weights, 75mm travel, preload adjust, 1-1/8"" steerer, alloy lowers, Hi-Ten 25.4mm stanchions, disc mount

    Bottom Bracket

    Square taper, cartridge bearings

    Headset

    1-1/8"" upper/lower, ZeroStack 44, steel cups, loose ball bearings

    Stem

    Specialized, forged alloy, 4-bolt, 10-degree rise

    Handlebar

    Specialized, steel, 8-degree backsweep, 4-degree upsweep, 35mm rise, 25.4mm

    Saddle

    Body Geometry mountain, thick padding, steel rails, 143mm

    Seatpost

    Alloy, 2-bolt, micro-adjust, 12.5mm offset, 30.9mm, anti-corrosion hardware

    Pedals

    Plastic, 9/16"", w/ reflectors

    Grips

    Specialized Body Geometry XCT, Kraton w/ gel, lock-on, closed end

    Groupset
    Rear Derailleur

    Shimano Tourney, 7-speed

    Front Derailleur

    Shimano Tourney, 3-speed, top swing, dual pull

    Crank

    Samox, forged alloy, square taper spindle, 42/34/24T, w/ chainguard

    Shifters

    Shimano ST-EF51, 7-speed, trigger, w/ integrated brake lever

    Cassette

    Sunrace, 7-speed, 11-34t

    Chain

    KMC X8, 8-speed, w/ reusable MissingLink

    Brakes

    Front: Tektro Aries, mechanical disc, organic pads, Rear: Tektro Aries, mechanical disc, organic pads

    Wheels
    Rims

    650b, disc, alloy, double-wall, pin joint, 25mm inner width, 32h

    Spokes

    Stainless, 14g

    Front Hub

    Specialized, Hi Lo disc, alloy, double-sealed, ground race, QR, 32h

    Rear Hub

    Specialized, Hi Lo disc, alloy, loose ball bearings, QR, 32h

    Tires

    Front: Specialized Fast Trak Sport, 40TPI, wire bead, Flak Jacket protection, 650bx2.0"", Rear: Specialized Fast Trak Sport, 40TPI, wire bead, Flak Jacket protection, 650bx2.0""

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