Cannondale Topstone 1 Obsidian SM

Explore further. Ride freer.

An amazingly capable, versatile gravel road bike. Built for chasing horizons, exploring routes less travelled or accelerating your commute.

Model Description

Pure gravel goodness. With the smooth-riding SmartForm C2 Alloy frame, the precise shifting of Shimano's upper tier GRX 2x12-speed gravel components, durable WTB rims and tires, and gear mounts galore, the Topstone 1 sets the standard for high performance versatility. Load up and head out.

What it's for

Gravel-riding, exploring, bikepacking, performance commuting

Highlights

• Lightweight SmartForm C2 Alloy frame w/ full carbon fork
• Exceptionally precise and refined shifting from Shimano's upper-tier mechanical GRX 820/600 2x12-speed gravel group
• Superb power and modulation from Shimano's GRX 600/400 hydraulic disc brakes
• Rugged, reliable, WTB ST i23 TCS tubeless ready rims with Riddler 700x37c tires
• Long distance comfort from Fizik's Aliante Delta saddle

• Specs

  Details

  • Platform

    Topstone Alloy
  • Model Name

    Topstone 1
  • Model Code

    C15603U

  Frameset

  • Frame

    Topstone, lightweight SmartForm C2 Alloy, 12x142 thru-axle, tapered headtube, BSA threaded BBm flat mount disc, StraightShot internal cable routing, multiple gear/bottle mounts
  • Fork

    Topstone Carbon, 1-1/8" to 1.5" steerer, 55mm OutFront offset, flat mount disc, internal routing, 12x100 thru-axle, fender/gear mounts
  • Headset

    Integrated, 1-1/8" - 1.5"

  Drivetrain

  • Rear Derailleur

    Shimano GRX 820, Shadow RD+
  • Front Derailleur

    Shimano GRX 820
  • Shifters

    Shimano GRX 600, 12-speed
  • Chain

    Shimano HG M7100, 12-speed
  • Crank

    Shimano GRX 600, 46/30
  • Rear Cogs

    Shimano HG R7100, 11-34, 12-speed
  • Bottom Bracket

    Shimano BSA 68

  Brakes

  • Brakes

    Shimano GRX 400 hydraulic disc, 160/160mm RT64 rotors
  • Brake Levers

    Shimano GRX 600 hydraulic disc

  Wheels

  • Rims

    WTB ST i23 TCS, 28h, tubeless ready
  • Spokes

    Stainless Steel, 14g
  • Tire Size

    37
  • Wheel Size

    700
  • Hubs

    (F) Formula cartridge bearing, 12x100mm centerlock / (R) Formula cartridge bearing, 12x142mm centerlock
  • Tires

    WTB Riddler TCS Light, 700x37c, tubeless ready

  Components

  • Handlebar

    Cannondale 3, butted 6061 Alloy, 16 deg flare drop: 400mm (XS), 420mm (SM-MD), 440mm (LG-XL)
  • Stem

    Cannondale 3, 6061 Alloy, 31.8, 7°: 80mm (XS), 90mm (SM-MD), 100mm (LG-XL)
  • Grips

    Cannondale Bar Tape, 3.5mm
  • Saddle

    Fizik Aliante Delta, S-alloy rails
  • Seatpost

    Cannondale 3, 6061 Alloy, 27.2x350mm

  Extra

  • Extra 1

    Tubeless valves