Cannondale Topstone 1 Alloy Bike

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Built for chasing routes less traveled, navigating tricky courses and speeding up your commute, the Cannondale Topstone 1 Alloy is a capable and versatile gravel road bike.

  • Features

    • SmartForm C2 Alloy construction and full carbon fork are lightweight, durable and high-performance
    • Gravel-specific Shimano GRX 800/600 11-speed shifting and Shimano GRX 400 hydraulic disc brakes offer excellent performance for rides that go beyond the pavement
    • Balanced riding position is upright enough for comfort over the long haul and control on technical terrain, yet still low and forward enough for speedy efficiency
    • 700c x 38 mm wide tires deliver comfort, grip and adventurous capability
    • Mounts for 3 water bottles, plus mounts for top tube storage; multiple bottle cage positions on the downtube mount let you configure for big frame bags
    • StraightShot internal cable routing; flat-mount disc
    • 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 LineView all Cannondale Gravel Bikes
  • Technical Specs

    Best Use

    Gravel Cycling

    Road Cycling


    SmartForm C2 Alloy


    Carbon, 1-1/8 to 1-1/4 in. steerer, 55 mm OutFront offset

    Bike Suspension

    No Suspension


    FSA Omega AGX+ alloy, 46/30T

    Bottom Bracket

    FSA cartridge


    Shimano GRX 600, 11-speed

    Front Derailleur

    Shimano GRX 800, braze-on

    Rear Derailleur

    Shimano GRX 810, Shadow RD+

    Rear Cogs

    Shimano 105 11-speed, 11-34T

    Number of Gears

    22 gear(s)

    Brake Type

    Hydraulic Disc Brake


    Shimano GRX 400, hydraulic disc, 160/160 mm RT54 rotors

    Brake Levers

    Shimano GRX 600 hydraulic disc


    WTB ST i23 TCS, 28h

    Front Hub

    Formula cartridge bearing, 12 x 100 mm, thru axle, Centerlock disc

    Rear Hub

    Formula cartridge bearing, 12 x 142 mm thru axle, Centerlock disc

    Wheel Size



    Vittoria Terreno Zero, 700c x 38 mm

    Tire Width

    38 millimeters

    Handlebar Shape

    Drop Bar


    Cannondale 3, butted 6061 alloy, 16 deg. flare


    Cannondale 3, 6061 alloy, 31.8 mm , 7 deg.

    Seat Post

    Cannondale 3, 6061 alloy, 27.2 x 350 mm


    Fabric Scoop Radius Sport, steel rails


    Not included


    1-1/8 to 1-1/4 in. tapered


    KMC X11, 11-speed


    22 lbs. 9.6 oz.

    Bike Weight

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



  • Size Chart

    Height Range5'0" - 5'5"5'4" - 5'9"5'7" - 6'1"5'11" - 6'4"6'3" - 6'8"
    Effective Top Tube52.554.456.157.959.6
    Seat Tube Center-Top41.045.850.555.360.0
    Standover Height70.374.478.482.586.3
    Head Tube Length8.911.814.918.221.4
    Head Tube Angle (degrees)7071717171
    Seat Tube Angle (degrees)
    Bottom Bracket Height7.
    Fork Offset5.

    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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