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Whether you're a die-hard hardtail aficionado or looking for a solid starter mountain bike, the Diamondback Overdrive is an aluminum hardtail that delivers performance but won't break the bank.

  • Features

    • Hand-built aluminum alloy hardtail frame is ideal for classic mountain biking
    • Custom formed and butted tubing combines lightweight performance and stiffness
    • 27.5 in. wheels roll well over obstacles and offer quick handling
    • Big knobby tires grip roots and rocks, keeping you confident and in control as you explore the trail
    • SR Suntour XCT fork delivers 80mm of suspension travel
    • 3 gears in the front and 8 gears in the back give you a combined 24 speeds to adapt to the terrain
    • Powerful disc brakes offer superior stopping control


    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



    Overdrive 27.5" Butted 6061-T6 Aluminum, Forged Drop Outs, w/ Replaceable Hanger, Disc Only

    Bike Suspension

    Front Suspension


    SR Suntour XCT 27.5", Coil Spring, 80mm Travel, w/ Preload Adjust

    Fork Travel

    80 millimeters


    Suntour XCT, 42/32/22T

    Bottom Bracket

    Square Taper - 5pc


    Shimano EF-51 Easyfire, 3x8 Speed

    Front Derailleur

    Shimano Tourney TY500, Top Swing, Dual Pull, 34.9mm Clamp Diameter

    Rear Derailleur

    Shimano Acera M360, 8 Speed

    Rear Cogs

    Shimano HG31 Cassette, 8 Speed, 11-32T

    Number of Gears


    Brake Type

    Mechanical Disc Brake


    Tektro Aries Mechanical Disc w/ 160mm Rotors

    Brake Levers

    Shimano EF-51


    DB SL-27 27.5" 32h Doublewall

    Front Hub

    32h SL-7 Alloy w/ CNC Disc Mount

    Rear Hub

    32h SL-7 Alloy Cassette w/ CNC Disc mount

    Wheel Size

    27.5 inches


    Chaoyang Hornet, 27.5x2.1"

    Tire Width

    2.1 inches

    Handlebar Shape

    Riser Bar


    DB Laser Series, 680mm Wide, 15mm Rise, 31.8mm Bar Bore


    DB 3D Forged, 7 Rise, 31.8 Bar Bore

    Seat Post

    DB Micro Adjust 30.9mm


    DB Race M-Series Saddle


    DB4L Resin Platform


    FSA IS-3/NO.11 Integrated Style


    KMC Z82, 8 Speed



    Bike Weight

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



  • Size Chart

    S M L XL
    Height Range 5'4" - 5'7" 5'7" - 5'10" 5'10" - 6'1" 6'1" - 6'4"
    Reach 398 418 433 447
    Stack 575 593 611 630
    Effective Top Tube 574 600 620 640
    Seat Tube Center-Top 410 460 510 560
    Standover Height 758 796 831 867
    Head Tube Length 105 125 145 165
    Head Tube Angle (degrees) 68 68 68 68
    Seat Tube Angle (degrees) 73 73 73 73
    Bottom Bracket Height 308 308 308 608
    Wheelbase 1082 1110 1132 1154
    Chainstay 425 425 425 425
    Fork Offset 44 44 44 44

    Sizing Notes

    Bike measurements are stated in millimeters.

  • Reviews
    2 reviews with an average rating of 4.5 out of 5 stars

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