Cannondale Topstone Neo SL 2 Electric Bike

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A lightweight, capable and versatile e-bike that thrives on gravel and mixed-terrain riding, the Cannondale Topstone Neo SL 2 was built to chase horizons, explore and accelerate your daily routine.

  • Features

    • SmartForm C2 Alloy frame and a full carbon fork are a lightweight yet durable combo
    • Shimano GRX 400/600 drivetrain and hydraulic disc brakes offer excellent on- and off-road performance
    • Light and powerful Mahle ebikemotion X35 250W rear-hub drive system offers 3 levels of support for pedal assist up to 20 mph and a range of up to 47 mi. (75 km)
    • Multiple gear and bottle mounts let you customize your carry
    • Integrated top tube controller lets you turn the system on, select your assist level and see your battery charge at the touch of a button, keeping your handlebars uncluttered
    • Dialed endurance fit is upright enough for comfort over the long haul and control when tackling off-road terrain, yet low and forward enough for speedy efficiency
    • Roomy frame and fork offer plenty of clearance for the included 700c x 42 mm tires
    • A simple to use, easy-access charging port makes topping up the battery a breeze
    • You can also plug in an optional range extender (not included) for a total battery capacity of 450 Wh and take your rides even farther
    • 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 Gravel Bikes
  • Technical Specs

    Best Use

    Road Cycling

    Gravel Cycling

    E-Bike Classification

    Class 1: pedal assist up to 20 mph


    Mahle ebikemotion X35 250W

    Motor Type

    Geared Hub

    Motor Torque (Nm)

    40 Newton meters

    Battery Type

    Lithium Ion

    Battery Capacity (Wh)

    250 watt hours

    Battery Removable


    Charge Time (hrs)

    4 hours

    Pedal Assist Range

    47 miles

    Bike Frame Material



    SmartForm C2 Alloy with flat-mount disc

    Bike Suspension

    No Suspension


    Carbon with 1-1/8 to 1-1/4 in. steerer, 55 mm OutFront offset, flat-mount disc, internal routing, 12 x 100 mm thru axle

    Fork Travel

    Not Applicable


    Shimano GRX 600, 46/30T

    Bottom Bracket

    Shimano BSA Sealed


    Shimano GRX 400, 2 x 10-speed

    Rear Derailleur

    Shimano GRX 400, Shadow RD+

    Rear Cogs

    Shimano HG500, 11-34T, 10-speed

    Number of Gears

    20 gear(s)

    Brake Type

    Hydraulic Disc Brake


    Shimano GRX hydraulic disc, 160 mm RT56 rotors

    Brake Levers

    Shimano GRX hydraulic disc


    Cannondale Disc, double wall, tubeless-ready 32h in rear and 28h in front

    Front Hub

    Formula CL-712, 12 x 100 mm thru axle, disc

    Rear Hub

    Mahle ebikemotion X35; 135 mm bolt-on

    Wheel Size



    WTB Resolute Comp, 700c x 42 mm, tubeless-ready

    Tire Width

    42 millimeters

    Handlebar Shape

    Drop Bar


    Cannondale 3, butted 6061 alloy, 16 degree flare drop


    Cannondale 3, 6061 alloy, 31.8 mm, 7 degree

    Seat Post

    Promax SP-2032, alloy, 27.2 mm


    Fabric Scoop Shallow Sport, steel rails


    Not included


    Integrated; 1-1/2 to 1-1/8 in. (lower to upper) tapered with reducer; 25 mm alloy top cap




    32 lbs. 6.4 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
    Reach 37.7 38.7 39.4 40.2
    Stack 54.7 57.8 61.1 64.0
    Effective Top Tube 53.4 55.3 56.9 58.6
    Seat Tube Center-Top 44.5 49.0 53.5 58.0
    Standover Height 75.1 79.0 83.0 86.9
    Head Tube Length 12.6 15.7 19.1 22.2
    Head Tube Angle (degrees) 70.5° 71.0° 71.0° 71.0°
    Seat Tube Angle (degrees) 74.0° 74.0° 74.0° 74.0°
    Bottom Bracket Height 65.4 65.4 65.4 65.4
    Wheelbase 103.1 104.7 106.5 108.3
    Chainstay 43.0 43.0 43.0 43.0
    Fork Offset 5.5 5.5 5.5 5.5

    Sizing Notes

    Measurements are stated in centimeters unless otherwise indicated.

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