This product is not available.

Shop similar products

When life gives you roots, rocks, sand or snow—anything, really—you'll be thrilled that you can roll over it like it's shag carpet when you're astride the Co-op Cycles DRT 4.1 fat-tire bike.

  • Features

    • Strong, rigid aluminum frame keeps the ride fast and saves the weight of a suspension fork—who needs it with those tires soaking up the bumps!
    • Fat-tire bikes are all about floating; this one rolls on Innova 26 x 4.8 in. (!) tires that'll glide over just about anything but have low-profile knobs for speed on hardpack
    • 1 x 12 drivetrain with SRAM X1 1000 Eagle™ crankset and SRAM SX Eagle 12-speed rear derailleur for swift, streamlined shifting and reduced overall weight
    • Shimano hydraulic disc brakes deliver reliable stopping power on or off road and in variable weather conditions
    • Front and rear thru axles provide added rigidity
    • Bicycle weight limit is 300 lbs. total, including rider plus all gear carried on the bike and on the rider's body
    • Pedals not included; specs and images 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 Hardtail Mountain Bikes
  • Technical Specs

    Best Use

    Mountain Biking

    Mountain Bike Style


    Bike Frame Material



    Co-op Cycles 6061 aluminum

    Bike Suspension

    No Suspension


    6061 aluminum


    SRAM X1 1000 Eagle™ DUB fat 5

    Bottom Bracket

    SRAM DUB English BSA 100mm fat


    SRAM SX Eagle 12-speed

    Rear Derailleur

    SRAM SX Eagle 12-speed

    Rear Cogs

    SRAM Eagle, 11-50t, 12-speed

    Number of Gears

    12 gear(s)

    Brake Type

    Hydraulic Disc Brake


    Shimano Acera MT-400 hydraulic disc

    Brake Levers



    26" aluminum

    Front Hub

    15mm thru axle

    Rear Hub

    12mm thru axle

    Wheel Size

    26 inches


    Innova 26 x 4.8 in.; 60 TPI

    Tire Width

    4.8 inches

    Handlebar Shape

    Riser Bar


    Co-op Cycles alloy butted aluminum riser


    Co-op Cycles 6061 aluminum

    Seat Post

    Co-op Cycles 6061 aluminum


    WTB Pure Sport


    Not included


    Internal headset


    SRAM SX Eagle


    39 pounds

    Bike Weight

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



  • Size Chart

    XS S M L XL
    Reach 400 425 450 475 500
    Stack 573 577 587 596 610
    Effective Top Tube 564 591 618 646 675
    Seat Tube Center-Top 360 395 430 465 500
    Standover Height 704 728 750 773 795
    Head Tube Angle (degrees) 68 68 68 68 68
    Seat Tube Angle (degrees) 72 72 72 72 72
    Wheelbase 1100 1127 1156 1185 1215
    Chainstay 445 445 445 445 445

    Sizing Notes

    Measurements are stated in millimeters unless otherwise indicated.

  • Reviews

    Loading Reviews...
  • Questions & Answers

    Loading Questions...