Cannondale Topstone Carbon 3 GRX - 1x

The Cannondale Topstone Carbon 3 GRX - 1x is a versatile carbon-framed gravel bike for long gravel road rides, bikepacking, fast mixed-terrain riding, and demanding adventure routes. The single-front-chainring Shimano GRX 1x12 drivetrain makes riding clear and reliable, while still offering an extremely wide range for steep climbs, fast transitions, and varied gravel conditions.

The Topstone Carbon frame's KingPin suspension brings comfort and grip to the bike without the weight or complexity of traditional rear suspension. The rear of the frame flexes in a controlled manner on uneven surfaces, which reduces vibration, improves rear-wheel grip, and makes long rides more enjoyable. This makes the Topstone an especially good choice for riders who ride more than just smooth gravel roads.

The GRX 610/822 groupset combines ergonomics designed for gravel riding, powerful hydraulic disc brakes, and the simplicity of a 1x12 drivetrain. The 40T front chainring and 10–51T cassette provide a wide range without a front derailleur, keeping the drivetrain simpler, quieter, and easier to use in technical terrain. WTB ST i25 TCS rims and 700x45c WTB Riddler TCS Light tires complete the package as a rolling, grippy, and tubeless-ready gravel bike.

An ideal commuter bike and therefore a very popular company bike.

Manufacturer's size recommendation:

47cm 149-167cm
51cm 165-175cm
54cm 172-180cm
56cm 177-185cm
58cm 182-193cm
61cm 190-200cm

You can also get this bike as a company bike.

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Cannondale Topstone Carbon 3 GRX 1x

This gravel bike knows no bounds. The Cannondale Topstone Carbon 3 GRX combines a performance carbon frame, advanced Kingpin suspension, and the Shimano GRX groupset to deliver exceptional comfort and control in any terrain. The perfect choice for both weekend bikepacking trips and daily riding on gravel roads or asphalt.

GEOMETRY

Technical specifications

Frame

• Model: Topstone Carbon 3 GRX - 1x

• Model code: C15355U

Frame

• Topstone Carbon, Kingpin suspension system

• Proportional Response design

• Downtube Stashport storage compartment

• Internal cable routing

• 12x142 mm thru-axle

• Ready for a 27.2 mm seatpost

• UDH (Universal Derailleur Hanger)

• BSA 68 mm threaded bottom bracket

• Flat mount disc brake mount

• Removable mudguard bridge

• Multiple mounting points for accessories and water bottles

Front fork

• Topstone Carbon, 1-1/8"–1.5" steerer tube

• 55 mm OutFront offset

• Flat mount disc brake mount

• Internal cable routing

• 12x100 mm thru-axle

• Triple mounting for water bottles/accessories

• Mudguard mounts

Bottom bracket

• Acros IS52/40 ICR

Drivetrain

• Rear derailleur: Shimano GRX 822, Shadow SGS

• Derailleurs: Shimano GRX 610, 12-speed

• Chain: Shimano M7100, 12-speed

• Crankset: Shimano GRX 610, 40T

• Cassette: Shimano SLX M7100, 10–51, 12-speed

• Bottom bracket: Shimano BSA 68

Brakes

• Shimano GRX 610 hydraulic disc brakes, 160/160 mm RT70 rotors

• Brake levers: Shimano GRX 610 hydraulic

Wheels

• Rims: WTB ST i25 TCS, 28h, tubeless ready

• Spokes: Stainless steel, 14g

• Tire size: 45 mm

• Wheel size: 700c

• Hubs:

  • Front: Shimano TC500, 12x100 mm, centerlock

  • Rear: Shimano TC500, 12x142 mm, centerlock

• Tires: WTB Riddler TCS Light, 700x45c, tubeless ready

Components

• Handlebar: Cannondale 3, 6061 aluminum, 16° flare

• Stem: Cannondale C1 Conceal, aluminum, 31.8 mm, -6°

• Bar tape/grips: Cannondale KnurlCork, 2.7 mm

• Saddle: Selle Royal SRX Open

• Seatpost: Cannondale 3, 6061 aluminum, 27.2 x 350 mm

Connections

• Cannondale Wheel Sensor

Accessories

• Large StashBag frame bag (downtube storage)

Tubeless valves