Cannondale Topstone Carbon Lefty 3 Bike - 2021

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The gravel bike to beat all gravel bikes, the comfortable, capable, dual-suspension Cannondale Topstone Carbon Lefty 3 thrives off road, on road, up and down hills, and out in the elements.

  • Features

    • Refined geometry and dialed endurance fit rider position deliver an experience that's stable, composed and comfortable without losing that spark
    • The dual-suspension Topstone's Kingpin rear suspension and Lefty Oliver suspension gravel fork absorb bumps and road vibration for comfort, control and pure gravel performance
    • Kingpin gives you up to 30mm of rear suspension (deflection at the seat and rear axle combined) using a thru-axle pivot in the seat to improve comfort, traction and control
    • Lefty Oliver suspension fork delivers up 30mm of bump-smoothing travel for comfort, control and an unwaveringly precise ride on both the smooth stuff and the rough stuff
    • Gravel-optimized Shimano GRX 600 shifter and GRX 800 Wide rear derailleur deliver smooth and stable 1 x 11-speed shifting across a wide range of gears
    • Shimano GRX 400 hydraulic disc brakes provide greater control and stopping power for confident mixed-terrain riding
    • 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
    • With Proportional Response, the suspension, frame stiffness and ride-feel are custom tuned by size for an ultrasmooth ride and confident traction for every rider
    • High-volume 650b x 47mm tires provide excellent off-road traction and run at low pressures for a smooth, comfortable ride even on rougher terrain
    • 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
    • Carry plenty of gear and water, thanks to a multiposition mount on the down tube, plus mounts on the top tube, on the seat tube and under the down tube
    • Fully fender ready, Topstone features a removable fender bridge on the rear stays that's 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
    • With DirectLine cable routing, an internal tube guides cables and housing through the frame from entry to exit for headache-free service
    • Built to accept an internally routed 27.2mm dropper seatpost (not included)
    • An integrated wheel sensor delivers hyperaccurate speed, route and distance info, bike registration, service reminders and more—all through the free Cannondale app
    • Pedals not included
    • Specs and images are subject to change


    This bike comes with Coast to Coast Support, which includes:
    • 1 year of free adjustments (see more below)
    • In-store bike assembly
    • Pickup in store or curbside
    • Bike experts available at 170+ bike shops
    REI Co-op Members get more:
    • Free flat tire repairs (labor only; parts not included)
    • 20% off shop services
    More about our free adjustments:
    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 the Cannondale Topstone Product Line View all Cannondale Gravel Bikes
  • Technical Specs

    Best Use

    Gravel Cycling

    Road Cycling


    BallisTec carbon with Kingpin suspension


    Lefty Oliver with 30mm travel, 55mm offset, Chamber Damper w/ All-Over tune, ISO High-Ride air spring and tapered steerer

    Bike Suspension

    Full Suspension


    Cannondale 1 with 40T OPI SpideRing

    Bottom Bracket

    Cannondale BB30


    Shimano GRX 600, 11-speed

    Rear Derailleur

    Shimano GRX 800 Wide

    Rear Cogs

    11-42, 11-speed

    Number of Gears

    11 gear(s)

    Brake Type

    Hydraulic Disc Brake


    Shimano GRX 400 hydraulic disc, 160/160mm RT76 rotors

    Brake Levers

    Shimano GRX 600 hydraulic disc


    WTB ST i23 TCS, 28h, tubeless ready

    Front Hub

    Formula CDH-57, Lefty, 6-bolt

    Rear Hub

    Formula DHT-142 with 12x142 Speed Release

    Wheel Size



    WTB Byway TCS Light, 650b x 47mm, tubeless ready

    Tire Width

    47 millimeters

    Handlebar Shape

    Drop Bar


    Cannondale 3, butted 6061 alloy, 16 deg. flare drop


    Cannondale 2, 6061 Alloy, 31.8, 7 deg.

    Seat Post

    Cannondale 2, UD Carbon, 27.2 x 350mm


    Fabric Scoop Shallow Elite, cro-mo rails


    Not included


    1-1/8 to 1-1/2 in. tapered


    Shimano HG601, 11-speed


    23 lbs. 6.4 oz.

    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 36.8 37.7 38.5 39.4 40.1
    Stack 51.8 55 57.9 61 64.1
    Effective Top Tube 52.5 54.4 56.1 57.9 59.6
    Seat Tube Center-Top 41 45.8 50.5 55.3 60
    Standover Height 71 75.6 79.8 83.8 88
    Head Tube Length 9.7 13.1 16.5 19.8 23.2
    Head Tube Angle (degrees) 70 71.2 71.2 71.2 71.2
    Seat Tube Angle (degrees) 73.1 73.1 73.1 73.1 73.1
    Bottom Bracket Height 26.8 27.3 27.6 27.6 27.8
    Wheelbase 99.9 101 103 104.9 106.8
    Chainstay 41.5 41.5 41.5 41.5 41.5
    Fork Offset 5.5 5.5 5.5 5.5 5.5

    Sizing Notes

    Measurements are stated in centimeters unless otherwise indicated.

    How we measure bikes

    1. Standover Height Standover Height is a measurement from the ground to the top of the top tube, measured at the midpoint of the top tube.
    2. Reach Reach is the horizontal distance from the center of the cranks to the center of the head tube, measured at head tube level.
    3. Stack Stack is the vertical distance from the center of the cranks to the center of the head tube, measured to the top of the head tube.
    4. Effective Top Tube Effective top tube is the distance from the center of the head tube to the center of the seat tube/seat post, measured parallel to the ground.
    5. Seat Tube Center to Top Seat Tube length is the measurement of the seat tube, from the center of the cranks to the top of the seat tube.
    6. Head Tube Length Head Tube Length is measured from the bottom to the top of the head tube.
    7. Head Tube Angle Head Tube Angle is the acute angle between the head tube and the ground (measured towards the rear of the bike)
    8. Seat Tube Angle Seat Tube Angle is the acute angle between the seat tube and the ground (measured towards the rear of the bike).
    9. Bottom Bracket Height Bottom Bracket Height is a measurement taken vertically from the ground up to the center of the cranks.
    10. Wheelbase Wheelbase is the measurement from the center of the front axle to the center of the rear axle.
    11. Chainstay Length Chainstay Length is the measurement from the center of the cranks to the center of the rear axle.
    12. Fork Offset Fork Offset, or rake, is the distance from the front axle to a line drawn parallel to the center of the head tube or steering axis.
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