Diamondback Mission 1 27.5 Bike - 2017

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Equipped to handle any trail, the Diamondback Mission 1 27.5 bike will not back down.

  • Features

    • 6061-T6 aluminum frame with KnuckleBox suspension is super stiff and ultra durable
    • Single-sided hardware on 3 main pivot points allows convenient bearing access
    • Fox 34 Float CTD air front and LV rear suspension smooth the bumps out of any trail
    • SRAM NX X-Horizon 11-speed rear derailleur delivers silent, accurate shifting
    • Race Face Ride 32t narrow/wide 1x crankset is practical and efficient
    • Specs are 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 Full-Suspension Mountain Bikes
  • Technical Specs

    Best Use

    Mountain Biking

    Mountain Bike Style


    Bike Frame Material



    6061-T6 aluminum

    Bike Suspension

    Full Suspension


    Fox Performance 34 Float, 160mm travel with 15mm thru-axle and rebound adjust

    Fork Travel

    160 millimeters

    Rear Shock

    Fox Float DPS with rebound adjust, 160mm


    Race Face Ride, 32t

    Bottom Bracket

    Race Face outboard bearing


    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


    SRAM Level T Hydraulic Disc, with 180mm front/rear centerline rotors

    Brake Levers

    SRAM Level Hydraulic levers with tooled reach adjust


    Diamondback Blanchard 28R, tubeless compatible, 32h

    Front Hub

    32h Alloy,15mm thru-axle, sealed cartridge bearing; CNC disc mount

    Rear Hub

    32h Alloy, 142x12mm thru-axle, 4 sealed cartridge bearing, cassette

    Wheel Size

    27.5 inches


    WTB Vigilante Comp, 27.5x2.3

    Tire Width

    2.3 inches

    Handlebar Shape

    Riser Bar


    DB35 Alloy, 780mm wide, 15mm rise, 35mm bar bore


    DB35 Alloy, 50mm reach, 35mm bar bore

    Seat Post

    DB Alloy micro adjust, 30.9mm


    WTB Volt Comp


    DB4L Alloy platform with replaceable pins


    FSA No-57E Taper 1.5 /1-1/8" standard cups, sealed cartridge


    KMC X11EL, 11-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 380 404 416 430
    Stack 589 589 604 622
    Effective Top Tube 559 584 610 635
    Seat Tube Center-Top 381 432 483 533
    Standover Height 762 775 800 813
    Head Tube Length 105 105 120 140
    Head Tube Angle (degrees) 66.5 66.5 66.5 66.5
    Seat Tube Angle (degrees) 73 73 73 73
    Bottom Bracket Height 342 342 342 342
    Wheelbase 1134 1159 1176 1198
    Chainstay 451 451 451 451
    Fork Offset 44 44 44 44

    Sizing Notes

    Bike measurements are stated in millimeters.

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