Cannondale Topstone CAAD 1 GRX 2x: aluminum gravel bike

Always ready to explore new horizons.

The Cannondale Topstone CAAD 1 GRX 2x is a high-performance aluminum gravel bike designed to tackle dirt roads, mixed terrain, and long distances with efficiency, control, and versatility. Ideal for those who love exploring less-traveled routes, tackling bikepacking adventures, and making daily commutes more dynamic, it combines a premium SmartForm C1 aluminum frame, a carbon fork, and a Shimano GRX 2x12 drivetrain.

Thanks to its gravel-specific geometry, generous 52 mm tire clearance, and numerous mounting points for accessories, bags, and bottle cages, this Cannondale gravel bike is ready to accompany you on both fast rides and fully loaded adventures.

Cannondale Topstone CAAD 1 GRX 2x: model description

The Cannondale Topstone CAAD 1 GRX 2x is designed for cyclists seeking the responsiveness and ride feel of the Topstone CAAD platform, with the added benefit of a wide-range double chainring drivetrain that offers a broader gear range and more precise cadence control.

The premium SmartForm C1 aluminum frame provides a structure designed for versatile gravel riding, while the all-carbon fork helps reduce weight and improve comfort and performance. The Shimano GRX 2x12 drivetrain, featuring GRX 820 and GRX 610 series components, makes it easy to handle changes in gradient and pace, from flat sections to the most demanding climbs.

The WTB wheels with i25 rims and 700x45c WTB Vulpine tires combine smooth rolling with grip on mixed terrain. The Cannondale Conceal system also helps keep the cockpit tidy and integrated.

Compatibility with tires up to 52 mm, multiple accessory mounts, and provisions for racks and fenders make the Topstone CAAD 1 GRX 2x a reliable companion for sport gravel riding, bikepacking, and long-distance outings.

Who is the Cannondale Topstone CAAD 1 GRX 2x for?

This Cannondale gravel bike is designed to tackle:

• Fast dirt roads and gravel routes.
• Long distances and endurance rides.
• Mixed terrain, from asphalt to dirt.
• Rolling hills and routes with frequent changes in gradient.
• Bikepacking adventures and fully loaded rides.
• Daily commutes and road riding.

Key features and benefits

• Premium SmartForm C1 aluminum frame: a high-end structure covered by Cannondale's lifetime warranty.
• Shimano GRX 2x12 drivetrain: a wide gear range to adapt your pedaling to different terrains and manage cadence with greater precision.
• All-carbon fork: designed to keep weight down while improving ride comfort and performance.
• WTB wheels and Vulpine tires: WTB ST i25 rims and 700x45c WTB Vulpine tires to combine rolling efficiency and grip.
• Cannondale Conceal system: integrated stem mount for a cleaner cockpit, with support for accessories and bike computers.
• Tire clearance up to 52 mm: greater versatility in tire choice, based on your needs and intended compatibility.
• Numerous mounting points: provisions for water bottles, accessories, racks, and fenders, ideal for bikepacking and touring.
• Suspension-ready geometry: frame designed to be compatible with suspension configurations supported by the platform.

Cannondale Topstone CAAD 1 GRX 2x technical specifications

Model details

• Platform: Topstone CAAD
• Model name: Topstone CAAD 1 GRX 2x
• Model code: C1511HU

Frame kit

Frame

• Model: Topstone CAAD
• Material and construction: SmartForm C1 Alloy
• Rear axle: 12x142 mm thru-axle
• Seat tube: 27.2 mm diameter, compatible with a dropper post
• Headset: 1.5" steerer tube, compatible with Acros
• Bottom bracket: 68 mm BSA threaded
• Brakes: Flat Mount disc mount, native 160 mm configuration
• Derailleur hanger: UDH
• Cable routing: StraightShot internal routing for cables and dynamo
• Mounts: multiple for gears and bottle cages
• Kickstand mount: provision for two 18 mm bolts
• Compatibility: racks and fenders
• Geometry: suspension-ready

Fork

• Model: Topstone Carbon
• Steerer tube: 1-1/8" to 1.5"
• OutFront offset: 55 mm
• Brakes: Flat Mount disc mount
• Cable routing: integrated routing for cables and dynamo
• Axle: 12x100 mm thru-axle
• Mounts: triple for water bottles and accessories
• Provision: fender mounts

Headset

• Acros IS52/40 ICR

Drivetrain

• Rear derailleur: Shimano GRX 820, Shadow RD+, 12-speed
• Front derailleur: Shimano GRX 820
• Shifters: Shimano GRX 610, 12-speed
• Chain: Shimano HG 7100, 12-speed
• Crankset: Shimano GRX 600, 46/30 teeth
• Crank arm length by size:
  • 165 mm: size 47 cm
  • 170 mm: size 51 cm
  • 172.5 mm: sizes 54–56 cm
  • 175 mm: sizes 58–61 cm
• Cassette: Shimano 105 R7100, 11-36 teeth, 12-speed
• Bottom bracket: Shimano BSA 68

Brakes

• Brakes: Shimano GRX 410 hydraulic disc brakes
• Rotors: Shimano RT64 Center Lock, 160/160 mm
• Brake levers: Shimano GRX 410 hydraulic disc brake levers

Wheels and tires

• Rims: WTB ST i25 TCS 2.0, 28-hole, tubeless-ready
• Spokes: stainless steel, 14G
• Wheel size: 700c
• Hubs: Shimano TC500 Center Lock
• Front hub: 12x100 mm
• Rear hub: 12x142 mm
• Freehub body: HG
• Tires: WTB Vulpine TCS Light, 700x45c, tubeless-ready

Components

Handlebar

• Model: Cannondale 3
• Material: variable-wall 6061 aluminum alloy
• Flare: 16°
• Drop: 120 mm
• Width by size:
  • 400 mm: sizes 47–51 cm
  • 420 mm: sizes 54–58 cm
  • 440 mm: size 61 cm

Stem

• Model: Cannondale C1 Conceal
• Material: aluminum
• Diameter: 31.8 mm
• Angle: -6°
• Length by size:
  • 70 mm: sizes 47–51 cm
  • 80 mm: size 54 cm
  • 90 mm: sizes 56–58 cm
  • 100 mm: size 61 cm

Bar tape

• Model: Cannondale KnurlCork
• Thickness: 2.7 mm

Saddle

• Model: Selle Royal SRX Open
• Width: 145 mm

Seatpost

• Model: Cannondale 3
• Material: 6061 aluminum alloy
• Dimensions: 27.2 x 350 mm

Included accessories

• Tubeless valves
• Cannondale Conceal Stem accessory and bike computer mount, compatible with Garmin, Wahoo and Hammerhead

Please Note

Technical specifications are subject to change without notice based on component availability.
Product images are for illustrative purposes only and may not perfectly reflect the described features.

Why choose the Cannondale Topstone CAAD 1 GRX 2x

The Cannondale Topstone CAAD 1 GRX 2x is an aluminum gravel bike designed for those seeking a versatile bike capable of going from asphalt to dirt without sacrificing efficiency and control. The SmartForm C1 frame, carbon fork, 12-speed Shimano GRX drivetrain, and WTB wheels offer a configuration suitable for both sport rides and multi-day adventures.

The 46/30 double chainring paired with the 11-36 cassette makes it possible to tackle a wide variety of routes, while the provision for tires up to 52 mm and numerous mounting points expand customization options.

Choose the Cannondale Topstone CAAD 1 GRX 2x if you are looking for a high-performance gravel bike, suitable for mixed terrain, long distances, and bikepacking, with the versatility needed to accompany you on daily adventures and off the beaten path.

Do you want to receive your bike ready for use? Don't forget to add the bike assembly service at the time of purchase! Discover all the details here: Francesconi bike assembly

A Complete Guide to Bike Sizes

Foreword: Not all bike sizes are the same

Each type of bike has a specific frame and often uses a different size scale. For example, a road bike with a 54cm frame might be considered a medium size by one brand, but a large by another.

Bicycle adjustment margins

Some types of bikes, like gravel bikes, offer a wide range of adjustments, adapting to different body types. Other models, however, have limitations in this regard. This is an important aspect to consider.

How to use size charts

We've created a simple guide to help you find the right bike size:

1. Check out our size charts for each bike type.
2. Learn more with specific tips to help you make the right choice.

Size Charts: Find Your Perfect Bike

Gravel and road bikes

Sizes are based on the length of the top tube (in cm), which determines the reach of the bike.

For gravel, measurements may vary slightly due to different geometries, but remain similar.

Mountain bike

MTBs are measured in inches, based on the seat tube.

Sizes also vary depending on the type of MTB: full-suspension , hardtail or fat bike .

Children's bikes

The size depends on the size of the wheels, often associated with age:

What to do with half measures?

If you are between two sizes:

• Comfort : Choose the larger size.
• Performance : Go for the smaller size.

Final tips for choosing

1. Consult the manufacturer's instructions : Always check the brand's guidelines.
2. Ask an expert : a specialized workshop can help you choose based on your height, ideal reach and goals.
3. Test the bike : If possible, test the model you intend to purchase.