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Capable off-road and comfortable on-road, the Cannondale Topstone Carbon 105 is a unique gravel bike with true suspension—but no heavy shock—offering 30mm of rear travel to smooth out bumps.

  • Features

    • Shimano 105 2 x 11 mechanical drivetrain with crisp, reliable shifting; hydraulic disc brakes offer excellent stopping power on any terrain
    • Lightweight KingPin suspension system lets you ride harder on dirt and more smoothly on pavement, giving you better control, traction and comfort
    • KingPin system provides up to 30mm of travel at the saddle thanks to a thru-axle pivot joining the seatstays and seat tube
    • Flex zones in the chainstays, seat tube and top tube offer compliance at the saddle and added absorption at the rear axle
    • Thru-axle LockR pivot locks the left and right seatstays together, preventing independent rotation for a solid feel and instantaneous response
    • Comes with big 700C x 37mm tires for grip and comfort, but fits up to 700C x 40mm tires thanks to a roomy design with tons of clearance
    • Also fits smaller 650B wheels with up to 48mm wide tires for riders who are looking for maximum flotation
    • Store gear and water with multiposition mounts on the downtube, top tube, seat tube and under the down tube—there are even mounts on the fork
    • Fully fender ready; a removable fender bridge on the rear stays is there when you need it and gone when you don't
    • Speed Release thru axles offer the stiffness and solid feel of a thru axle with the easy use of a quick-release axle; compatible with most thru-axle wheelsets
    • Direct Line internal cable routing guides the cable and housing through the frame using an internal tube from entry to exit for headache-free service
    • Built to accept an internally-routed 27.2 dropper seatpost
    • Balanced riding position is upright enough for comfort over the long haul and control for technical off-road terrain, yet still low and forward enough for speedy efficiency
    • OutFront steering geometry keeps the steering light and agile, while positioning the wheel farther in front of the rider for stability and confidence on rougher stuff
    • An integrated wheel sensor delivers hyperaccurate speed, route and distance info, bike registration, service reminders and more—all through the free Cannondale app
    • Suspension and overall frame ride-feel is custom-tuned by size using different carbon layup and tube dimensions
    • 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 Cannondale Endurance Bikes
  • Technical Specs

    Best Use

    Road Cycling

    Bike Frame Material



    BallisTec Carbon


    BallisTec Carbon, BB30-83 Ai, 142x12 Speed Release thru-axle, flat-mount disc

    Bike Suspension

    Seat Suspension


    Cannondale 1, BB30a, FSA rings, 46/30

    Bottom Bracket

    Cannondale Alloy PressFit30


    Shimano 105 hydro disc, 2x11

    Front Derailleur

    Shimano 105, braze-on

    Rear Derailleur

    Shimano 105 GS

    Rear Cogs

    Shimano 105, 11-34, 11-speed

    Number of Gears

    22 gear(s)

    Brake Type

    Hydraulic Disc Brake


    Shimano 105 hydro disc, 160/160mm RT30 rotors

    Brake Levers

    Shimano 105 hydro disc


    WTB ST i23 TCS, 28h, tubeless ready

    Front Hub

    Formula CL-712, 12x100 Center Lock

    Rear Hub

    Formula RXC-400, 12x142 Center Lock

    Wheel Size



    WTB Riddler TCS Light, 700c x 37mm, tubeless ready

    Tire Width

    37 millimeters

    Handlebar Shape

    Drop Bar


    Cannondale 3, butted 6061 alloy, 16° flare drop


    Cannondale 3, 6061 alloy, 31.8, 7°

    Seat Post

    Cannondale 3, 6061 alloy, 27.2 x 350mm


    Fabric Scoop Shallow Sport, steel rails


    Not Included


    Integrated, 1.5 in. lower to 1-1/8 in. upper with reducer, 25mm Alloy top cap


    KMC X11, 11-speed


    20 lbs. 14.4 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 5'4" - 5'9" 5'7" - 6'1" 5'11" - 6'4" 6'3" - 6'8"
    Reach 37.7 38.5 39.4 40.2
    Stack 54.9 57.9 61.0 64.0
    Effective Top Tube 54.4 56.1 57.9 59.6
    Seat Tube Center-Top 45.8 50.5 55.3 60.0
    Standover Height 76.1 80.3 84.3 88.5
    Head Tube Length 13.1 16.5 19.8 23.2
    Head Tube Angle (degrees) 71.2° 71.2° 71.2° 71.2°
    Seat Tube Angle (degrees) 73.1° 73.1° 73.1° 73.1°
    Bottom Bracket Height 27.8 28.0 28.0 28.3
    Wheelbase 101.0 103.0 104.0 106.0
    Chainstay 41.5 41.5 41.5 41.5
    Fork Offset 5.5 5.5 5.5 5.5

    Sizing Notes

    Measurements are stated in centimeters unless otherwise indicated.

  • Reviews
    5 reviews with an average rating of 3.8 out of 5 stars

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