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For the up and coming trail rider, the Diamondback Sync'r 24 in. bike is a capable hardtail mountain bike with top-shelf components for your little ripper to take their riding to the next level.

  • Features

    • Aluminum alloy frame has a replaceable derailleur hanger for durability and easier maintenance
    • Low slung geometry and 24 in. wheels give this bike nimble handling
    • SR Suntour XCR 24 in. suspension fork helps soak up bumps
    • 11-speed SRAM drivetrain with Gravity step-up cranks provide a great range of gears for varied terrain
    • Stout 24 in. wheels are built to take abuse


    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 Kids' Mountain Bikes
  • Technical Specs

    Best Use

    Mountain Biking

    Bike Frame Material



    6061-T6 aluminum; formed tubing

    Bike Suspension

    Front Suspension


    SR Suntour XCR 24" w/ preload adjust

    Fork Travel

    80 millimeters


    SRAM NX 1x, w/ X-sync 30T chain ring

    Bottom Bracket



    SRAM NX 11 speed X-actuation trigger

    Rear Derailleur

    SRAM NX X-horizon, 11 speed

    Rear Cogs

    SRAM PG1130, 11 speed, 11-42T

    Number of Gears


    Brake Type

    Hydraulic Disc Brake


    Tektro Auriga hydraulic disc w/ 180mm front /160mm rear rotors

    Brake Levers

    Tektro 2 finger hydraulic w/ reach adjust


    32h Diamondback SL-7 Doublewall

    Front Hub

    32h SL-7 alloy w/ CNC disc mount

    Rear Hub

    32h SL-7 alloy cassette w/ CNC disc mount

    Wheel Size

    24 inches


    Kenda Kinetics 24x2.35"

    Handlebar Shape

    Flat Bar


    Diamondback Pro Bar 720mm wide


    Diamondback shortie, 45mm Reach

    Seat Post

    DB alloy micro adjust 27.2mm


    DB Sync'r Jr.


    DB4L alloy platform


    FSA IS-3/NO.11 integrated style


    SRAM PC-1130, 11 speed, power link


    26 lbs. 11.2 oz.

    Bike Weight

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



  • Size Chart

    24 in
    Height Range 54" to 61"
    Reach 335
    Stack 479
    Effective Top Tube 495
    Seat Tube Center-Top 318
    Standover Height 648
    Head Tube Length 105
    Head Tube Angle (degrees) 69
    Seat Tube Angle (degrees) 71
    Bottom Bracket Height 294.6
    Wheelbase 962
    Chainstay 410
    Fork Offset 40

    Sizing Notes

    Bike measurements are stated in millimeters.

  • Reviews
    1 reviews with an average rating of 4.0 out of 5 stars

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