Cannondale Topstone 1
Cannondale Topstone 1
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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
https://www.cannondale.com/en-ca/bikes/road/gravel/topstone-alloy/topstone-1

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Specs
Topstone Alloy
Model Name
Topstone 1
Model Code
C15603U
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"
- 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
Shimano GRX 400 hydraulic disc, 160/160mm RT64 rotors
- Brake Levers
Shimano GRX 600 hydraulic disc
- 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
- Handlebar
Cannondale 3, butted 6061 Alloy, 16 deg flare drop
- Stem
Cannondale 3, 6061 Alloy, 31.8, 7°
- Grips
Cannondale Bar Tape, 3.5mm
- Saddle
Fizik Aliante Delta, S-alloy rails
- Seatpost
Cannondale 3, 6061 Alloy, 27.2x350mm