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If remote rides on country roads call your name, you need a bike that isn't scared of gravel. Get a durable steel frame, puncture-resistant tires and rack mounts with the Co-op Cycles ADV 3.1 bike.

  • Features

    • Double-butted chromoly steel frame offers durability for the backcountry and the reliably smooth ride quality that steel is known for
    • Flared handlebar with bar-end shifters enhances downhill handling on rough terrain
    • Shimano Deore triple crank powers the 30-speed drivetrain for versatile performance on any grade
    • TRP Spyre cable-actuated mechanical disc brakes offer excellent stopping power
    • Puncture-resistant 700 x 40c tires feature a wide, stable contact patch for confidence on varied terrain
    • Low-rider fork mounts and rear braze-ons accept front and rear racks for light touring (racks sold separately)
    • 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 Co-op Cycles Gravel Bikes
  • Technical Specs

    Best Use

    Bike Touring

    Gravel Cycling

    Bike Frame Material



    Double-butted chromoly steel


    Chromoly steel

    Bike Suspension

    No Suspension


    Shimano Deore, 48/36/26

    Bottom Bracket

    Shimano Deore SM-BB52 external bearing


    Microshift BS-M10 bar-end

    Front Derailleur

    Shimano Deore

    Rear Derailleur

    Shimano Deore

    Rear Cogs

    Shimano HG62, 11-34, 10-speed

    Number of Gears


    Brake Type

    Mechanical Disc Brake


    TRP Spyre mechanical disc

    Brake Levers



    Alex AT 470

    Front Hub

    Formula, 32h

    Rear Hub

    Formula, 32h

    Wheel Size



    DONNELLY X'PLOR MSO, 700 x 40mm

    Tire Width

    40 millimeters

    Handlebar Shape

    Drop Bar


    Co-op Cycles aluminum


    Co-op Cycles aluminum

    Seat Post

    Co-op Cycles aluminum


    WTB Pure V Race


    Sold separately


    FSA with turn limiter


    KMC Z99


    25 lbs. 9.6 oz.

    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 5'3" - 5'6" 5'6"- 5'9" 5'9" - 6'0" 6'0" - 6'3"
    Reach 368 369 372 370
    Stack 565 594 615 665
    Effective Top Tube 525 545 560 580
    Seat Tube Center-Top 450 490 530 570
    Standover Height 29 in. 31 in. 32 in. 33 in.
    Head Tube Length 130 150 175 230
    Head Tube Angle (degrees) 70 71 71 71
    Seat Tube Angle (degrees) 74.5 73.5 73 72.5
    Wheelbase 1041 1042 1052 1068
    Chainstay 445 445 445 445
    Fork Offset 50 50 50 50

    Sizing Notes

    Measurements are stated in millimeters unless otherwise indicated.

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