Bike Comparison
    MSRP
    $1,750
    Where to Buy
    $1

    At

    $1

    At

    Category
    GravelRace
    Weight
    21.8 lbs
    3.7
    4.1
    AluminumAluminum
    Fork
    CarbonCarbon
    Wheels
    AluminumAluminum
    Wheel Size
    700c700c
    Brakes
    Hydraulic DiscMechanical Disc
    Groupset
    105, FSAUltegra, Rotor
    Drivetrain
    2 × 112 × 11
    Brand Site

    cannondale.com

    ridley-bikes.com

    Summary
    The Cannondale Topstone 105 and Ridley Helium SLA Disc Ultegra are both aluminum frame road bikes. The Helium SLA Disc Ultegra has better components and higher gearing.
    Similar Bikes
    Accessories
    Ride Feel

    Based on frame geometry and build specs.

    Rider Position
    relaxedaggressive
    Terrain
    smoothrugged
    2020 Topstone 105
    2018 Helium SLA Disc Ultegra
    Other Gravel bikes
    Gear Range

    A bike with lower gearing will be easier to ride up steep hills, while a higher top end means it will pedal faster down hills.

    Lowest gear

    (climbing)

    36 mph

    2020 Topstone 105

    41 mph

    2018 Helium SLA Disc Ultegra

    Highest gear

    (descending)

    Spec Level

    Based on build material and quality level of the frame, fork, wheelset, groupset, suspension system, and more.

    Geometry
    Specs
    Frame

    SmartForm C2 Alloy, 142x12 thru-axle, tapered headtube, flat mount disc, StraightShot internal cable routing, multiple gear/bottle mounts, 142x12 thru-axle, Tapered headtube, Flat mount disc, StraightShot internal cable routing, Multiple gear/bottle mounts

    Helium SLA Disc, 6061 and 6066 Aluminium, 12mm TA, flatmount

    Fork

    Full Carbon, 1-1/8" to 1-1/4" steerer, 55mm OutFront offset, flat mount disc, internal routing, 12x100 thru axle

    Helium SLA Disc, 30T-24T HM UD Carbon, 12mm TA, Flatmount

    Shock

    none

    Bottom Bracket

    FSA Omega

    Headset

    Topstone Si, 25mm Alloy top cap

    Stem

    Cannondale 3, 6061 alloy, 31.8, 7°

    Forza Stratos

    Handlebar

    Cannondale 3, butted 6061 alloy, 16 deg flare drop

    Forza Stratos

    Saddle

    Fabric Scoop Radius Sport, steel rails

    Forza Cirrus Pro

    Seatpost

    Cannondale 3, 6061 Alloy, 27.2 x 350mm

    Forza Cirrus

    Pedals

    Not Included

    Grips

    Cannondale Grip Bar Tape w/Gel, 3.5mm

    Groupset
    Rear Derailleur

    Shimano 105 GS

    Shimano Ultegra

    Front Derailleur

    Shimano 105, 31.8 clamp

    Shimano Ultegra

    Crank

    FSA Omega ME alloy, 46/30

    Rotor 3D30 52/36

    Shifters

    Shimano 105 hydro disc, 2x11

    Shimano Ultegra

    Cassette

    Shimano 105, 11-34, 11-speed

    Shimano 105 11/28

    Chain

    KMC X11, 11-speed

    KMC x11

    Brakes

    Shimano 105 hydro disc, 160/160mm RT56 rotors

    Shimano Ultegra Disc

    Brake Levers

    Shimano 105 hydro disc

    Wheels
    Rims

    WTB ST i23 TCS, 28h, tubeless ready

    Fulcrum Racing Sport DB

    Spokes

    Stainless Steel, 14g

    Front Hub

    Formula RX-512, 12x100 centerlock

    Rear Hub

    Formula RX-142, 12x142 centerlock

    Tires

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

    Vittoria Zaffiro Pro

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