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A do-it-all hardtail that'll have you redefining your boundaries, the Diamondback Line 27.5 bike is stable under pressure, yet playful when you're looking to get some air or whip through corners.

  • Features

    • Reliable, hand-built aluminum hardtail frame has progressive, low-slung geometry that's made for trail-riding performance
    • Custom-formed and butted tubing adds strength without adding weight
    • Front suspension, courtesy of an SR Suntour XCR 120mm travel fork, comes equipped with a lockout for big climbing days
    • Hydraulic disc brakes with big rotors give you tons of traction and stopping power
    • Shimano 1x9 single-ring drivetrain with chain guide lets you blaze through the gears with pinpoint precision
    • 27.5 in. Diamondback SL-7 double-wall wheels can take a pounding
    • Frame is compatible with internally routed dropper posts (dropper post not included)
    • Specs and images subject to change


    Free Adjustment Period:
    New bikes go through a normal break-in period, after which they should be readjusted. All bicycles sold at REI include free adjustments for one year after purchase date—as many times as you need. Included: derailleur and brake adjustments, lateral wheel truing, hub and headset bearing adjustments, tire inflation and chain lubrication. Not included: replacement or installation of new components or accessories, any other services. Call your local REI Co-op Bike Shop for more information.
    View all Diamondback Hardtail Mountain Bikes
  • Technical Specs

    Best Use

    Mountain Biking

    Mountain Bike Style


    Bike Frame Material



    6061 aluminum

    Bike Suspension

    Front Suspension


    SR Suntour XCR, 120mm travel, 32mm stanchions, magnesium lowers, with preload adjust and hydraulic lockout

    Fork Travel

    120 millimeters


    Alloy arm with 30T steel "narrow wide" single ring

    Bottom Bracket

    Sealed cartridge


    Shimano Acera M3000, 9-speed

    Front Derailleur

    Full ISCG-05 chain guide with roller

    Rear Derailleur

    Shimano Acera M3000 Shadow, 9-speed

    Rear Cogs

    Shimano HG200, 9-speed, 11-36T

    Number of Gears

    9 gear(s)

    Brake Type

    Hydraulic Disc Brake


    Shimano M315 hydraulic disc, with 180mm front and 160mm rear rotors

    Brake Levers

    Shimano M315 hydraulic


    32h Diamondback SL-27.5 double-wall

    Front Hub

    32h Alloy with CNC Disc Mount

    Rear Hub

    32h Alloy with CNC disc mount, cassette

    Wheel Size

    27.5 inches


    WTB Vigilante, 27.5x2.3"

    Tire Width

    2.3 inches

    Handlebar Shape

    Riser Bar


    Diamondback, 750mm wide, 15mm rise, 31.8 bar bore


    Diamondback "Shortie", 45mm reach, 31.8 bar bore

    Seat Post

    Alloy micro adjust, 30.9mm


    DB Sync'r saddle


    DB4L Alloy platform


    Shimano Acera M3000, 9-speed


    30 pounds

    Bike Weight

    Bike weight is based on median size, as sold, or the average of two median sizes.



  • Reviews
    3 reviews with an average rating of 4.7 out of 5 stars

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