Cannondale Topstone Carbon 3 GRX 1x Gravel Bike

Name: Cannondale Topstone Carbon 3 GRX 1x Gravel Bike
SKU: CDC15195U1061
Price: 3667.0 AUD
Availability: OutOfStock

$3,667.00 SGD

The Cannondale Topstone Carbon 3 GRX 1x combines a lightweight carbon frame, KingPin rear compliance, dependable Shimano GRX 12-speed gearing and high-volume tubeless-ready tyres, making it an outstanding-value carbon gravel bike for Australian riders seeking comfort, confidence and genuine all-day versatility.

Key Cannondale Topstone Carbon 3 GRX 1x Features

Lightweight carbon frame with up to 30mm of KingPin rear travel helps smooth corrugations, increase seated traction and reduce fatigue over long distances.
Shimano GRX 1x12 drivetrain combines simple operation with a wide 10-51T cassette for steep gravel climbs and fast mixed-surface riding.
Tubeless-ready WTB wheels and 700x45c Riddler tyres provide dependable grip, comfort and control on gravel roads, broken bitumen and light trails.
StashPort downtube storage, extensive cargo mounts and dropper-post routing make it ready for bikepacking, endurance events and longer adventures.
Clearance for measured tyres up to 52mm allows the Cannondale Topstone Carbon 3 GRX 1x to be adapted for faster gravel or more demanding off-road terrain.

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More Product Details:

Model year: 2026

Australian recommended retail price: $3,999

Colour: Deep Teal

Manufacturer model code: C15195U

Intended use:

Gravel riding and racing
All-road cycling
Bikepacking
Endurance riding
Recreational fitness
Rough-road exploration
Rail-trail touring
Fast mixed-surface riding
Long-distance cycling on dirt and pavement

The Cannondale Topstone Carbon 3 GRX 1x occupies one of the most appealing positions in the Topstone range. It gives riders access to the full carbon KingPin platform, integrated frame storage and broad tyre clearance without the higher cost of electronic shifting or factory-fitted carbon wheels.

Frameset

Frame: Cannondale Topstone Carbon

Frame material: Carbon fibre

Rear compliance system: Cannondale KingPin

Maximum rear movement: Up to 30mm

Frame construction: Proportional Response size-specific carbon construction

Integrated storage: StashPort with included StashBag

Cable routing: Internal

Rear axle: 12x142mm thru-axle

Rear derailleur hanger: Universal Derailleur Hanger

Bottom bracket standard: BSA threaded

Bottom bracket shell width: 68mm

Brake mounting: Flat mount disc

Seatpost diameter: 27.2mm

Dropper-post compatible: Yes

Dropper routing: Internal

Rear mudguard compatibility: Removable mudguard bridge

Accessory mounting: Multiple bottle, cargo, top-tube and equipment mounts

Fork

Fork: Cannondale Topstone Carbon

Fork material: Carbon fibre

Steerer: Tapered 1 1/8-inch to 1.5-inch

Fork offset: 55mm

Steering system: Cannondale OutFront Steering Geometry

Front axle: 12x100mm thru-axle

Brake mounting: Flat mount disc

Routing: Internal brake routing

Fork mounts: Triple bottle or cargo mounts

Mudguard compatibility: Yes

Drivetrain

Drivetrain: Shimano GRX mechanical 1x12-speed

Rear derailleur: Shimano GRX RX822 Shadow RD+ SGS

Shift and brake levers: Shimano GRX RX610

Crankset: Shimano GRX RX610

Chainring: 40T

Cassette: Shimano SLX CS-M7100

Cassette range: 10-51T

Number of cassette sprockets: 12

Chain: Shimano CN-M7100, 12-speed

Freehub interface: Shimano Micro Spline

Bottom bracket: Shimano BSA 68mm

Lowest gear: 40 x 51T

Highest gear: 40 x 10T

Total cassette range: 510%

The 40x51T lowest gear provides an approximate ratio of 0.78, making it suitably low for steep gravel climbs, loose fire roads and longer rides carrying luggage. The 40x10T highest gear retains practical speed for hardpack, descending and sealed-road connections.

The 510% range is broader than many conventional gravel drivetrains. This gives the Cannondale Topstone Carbon 3 GRX 1x considerable climbing flexibility without adding a front derailleur, second chainring or additional shift cable.

Brakes

Brake system: Shimano GRX RX610 hydraulic disc

Brake levers: Shimano GRX RX610 hydraulic

Front rotor: Shimano RT70 Center Lock, 160mm

Rear rotor: Shimano RT70 Center Lock, 160mm

Brake mounting: Flat mount

The hydraulic braking system delivers progressive stopping power, consistent lever feel and automatic compensation for gradual pad wear. The 160mm rotors are appropriate for general gravel, all-road and endurance use.

Heavier riders or cyclists carrying substantial bikepacking equipment should discuss their braking requirements with a professional workshop before changing rotor sizes or caliper adaptors.

Wheels and Tyres

Rims: WTB ST i25 TCS

Rim material: Aluminium

Internal rim width: 25mm

Spoke count: 28 front and rear

Spokes: Stainless steel, 14-gauge

Tubeless compatibility: Yes

Front hub: Shimano TC500, 12x100mm, Center Lock

Rear hub: Shimano TC500, 12x142mm, Center Lock

Rear freehub: Shimano Micro Spline

Wheel size: 700c

Tyres: WTB Riddler TCS Light

Tyre size: 700x45c

Tyre construction: Tubeless-ready

Maximum measured frame tyre width with a 1x drivetrain: 52mm

Maximum measured frame tyre width with a 2x drivetrain: 45mm

Maximum measured fork tyre width: 56mm

The 25mm internal rim width supports modern high-volume gravel tyres well. It gives the original 45mm WTB Riddler tyres an appropriate profile for stability, predictable cornering and relatively low operating pressures.

The WTB Riddler tread combines a faster central section with more pronounced shoulder knobs. This gives the tyre useful rolling speed on sealed roads and hardpack while adding grip when cornering on loose gravel.

Cockpit and Contact Points

Handlebar: Cannondale 3

Handlebar material: Butted 6061 aluminium

Handlebar flare: 16 degrees

Handlebar drop: 120mm

Stem: Cannondale C1 Conceal

Stem material: Aluminium

Stem angle: -6 degrees

Handlebar clamp diameter: 31.8mm

Bar tape: Cannondale KnurlCork, 2.7mm

Saddle: Selle Royal SRX Open

Seatpost: Cannondale 3 aluminium

Seatpost material: 6061 aluminium

Seatpost diameter: 27.2mm

Seatpost length: 350mm

Included Extras

Large Cannondale StashBag
Tubeless valve stems

KingPin Rear Compliance

KingPin is Cannondale’s lightweight approach to increasing gravel comfort and rear-wheel control. A thru-axle pivot positioned where the seatstays meet the seat tube allows controlled vertical movement through engineered flex in the rear triangle, seat tube and seatpost.

The system provides up to 30mm of movement at the saddle without using a conventional rear shock, air spring or complicated multi-link suspension arrangement.

KingPin is designed to reduce the sharpness of repeated impacts from corrugations, embedded rocks, broken road edges and rough hardpack. Rather than feeling obviously active or bouncy, it works quietly beneath the rider to make long rides feel less punishing.

This distinction is important. The Cannondale Topstone Carbon 3 GRX 1x does not behave like a mountain bike with rear suspension. It retains the efficient pedalling character of a gravel bike while offering more forgiveness than a completely rigid carbon frame.

The controlled movement can also help the rear tyre remain connected to uneven ground. This is particularly valuable when climbing loose gravel from a seated position, where wheelspin can quickly interrupt momentum.

Proportional Response Construction

Cannondale adjusts the carbon lay-up and selected geometry measurements for each frame size. This Proportional Response approach recognises that a smaller rider and a taller rider load a bicycle differently.

A single carbon structure used across every size could feel appropriately compliant for one rider but too stiff or too flexible for another. Size-specific construction is intended to provide a more consistent relationship between frame stiffness, KingPin movement and overall ride quality.

The result is a carbon gravel frame developed around the rider rather than simply enlarged or reduced from one central size.

Shimano GRX 1x12 Drivetrain

Shimano GRX is purpose-designed for gravel riding, with ergonomics, gear capacity and chain management developed around mixed-surface use.

The single 40T chainring keeps operation uncomplicated. Every gear change is managed from the rear shifter, allowing the rider to concentrate on braking, line choice and maintaining traction when the terrain changes suddenly.

The Shimano GRX RX822 SGS rear derailleur is designed to manage the large 10-51T cassette. Its Shadow RD+ clutch adds resistance to unwanted cage movement, helping control the chain over corrugations, potholes and rough trails.

Better chain control can reduce noise and minimise excessive chain movement. The derailleur clutch can be disengaged when removing the rear wheel or carrying out selected workshop procedures.

Wide 510% Gear Range

The 10-51T cassette provides a full 510% range. This gives the Cannondale Topstone Carbon 3 GRX 1x a low enough climbing gear for demanding gravel without sacrificing a useful high-speed ratio.

For Australian riders, that range is particularly relevant on routes where a fast sealed-road approach quickly becomes a steep, loose fire-road climb. There is enough high-end gearing to maintain speed on flatter sections, while the 51T sprocket provides welcome relief when the gradient or surface becomes challenging.

The compromise is wider spacing between some gears than a 2x drivetrain. Riders who spend most of their time in fast road groups may prefer smaller cadence changes. For gravel exploration, bikepacking and steep mixed-terrain riding, the simplicity and broad range of the 1x12 system are highly persuasive.

StashPort and StashBag

StashPort creates a concealed storage compartment inside the downtube, accessed beneath the bottle cage. The included StashBag is designed to keep compact repair equipment protected and organised inside the frame.

Available frame sizes (check local stock or reach out to us)

47cm
51cm
54cm
56cm
58cm
61cm

Approximate Rider Height Guidance

47cm: 149-168cm
51cm: 165-176cm
54cm: 172-181cm
56cm: 177-186cm
58cm: 182-193cm
61cm: 190-201cm

These ranges overlap because rider height cannot account for leg length, torso proportions, flexibility, shoulder width, previous injuries or preferred riding position.

Cyclists choosing between two sizes should consider professional sizing rather than selecting entirely by height. This is especially important for long-distance riders, as small differences in cockpit length, saddle position and handlebar width can become increasingly noticeable over several hours.

Size-Specific Crank Lengths

47cm: 165mm
51cm: 170mm
54cm: 172.5mm
56cm: 172.5mm
58cm: 175mm
61cm: 175mm

Size-Specific Handlebar Widths

47cm: 400mm
51cm: 420mm
54cm: 420mm
56cm: 440mm
58cm: 440mm
61cm: 440mm

Size-Specific Stem Lengths

47cm: 70mm
51cm: 70mm
54cm: 80mm
56cm: 90mm
58cm: 90mm
61cm: 100mm

Frame Geometry

47cm:

Stack: 554mm
Reach: 364mm
Wheelbase: 1009mm
Standover height: 716mm
Head angle: 69.9 degrees
Trail: 73mm
Bottom bracket drop: 79mm

51cm:

Stack: 561mm
Reach: 373mm
Wheelbase: 1012mm
Standover height: 741mm
Head angle: 70.7 degrees
Trail: 67mm
Bottom bracket drop: 79mm

54cm:

Stack: 579mm
Reach: 378mm
Wheelbase: 1026mm
Standover height: 772mm
Head angle: 70.7 degrees
Trail: 67mm
Bottom bracket drop: 76mm

56cm:

Stack: 597mm
Reach: 383mm
Wheelbase: 1036mm
Standover height: 800mm
Head angle: 70.7 degrees
Trail: 67mm
Bottom bracket drop: 76mm

58cm:

Stack: 615mm
Reach: 389mm
Wheelbase: 1050mm
Standover height: 831mm
Head angle: 70.7 degrees
Trail: 67mm
Bottom bracket drop: 74mm

61cm:

Stack: 646mm
Reach: 397mm
Wheelbase: 1069mm
Standover height: 864mm
Head angle: 70.7 degrees
Trail: 67mm
Bottom bracket drop: 74mm

Shared Geometry and Measurements

Seat-tube angle: 73.1 degrees

Chainstay length: 420mm

Fork offset: 55mm

Seatpost diameter: 27.2mm

Bottom bracket shell: BSA 68mm threaded

Front axle: 12x100mm

Rear axle: 12x142mm

Wheel diameter: 700c

Fitted tyre size: 700x45c

Maximum measured frame tyre width with 1x drivetrain: 52mm

Maximum measured fork tyre width: 56mm

Internal rim width: 25mm

Front brake rotor diameter: 160mm

Rear brake rotor diameter: 160mm

Handlebar clamp diameter: 31.8mm

Complete bicycle width: Varies according to frame size and fitted handlebar

The Cannondale Topstone Carbon 3 GRX 1x is an excellent choice for riders who want carbon-bike comfort and performance without paying for electronic shifting or premium carbon wheels they may not need.

Initial Workshop Service

A premium gravel bike should receive a professional inspection after its first period of regular riding. Spokes, headset components, rotors and mounting hardware can settle during the initial rides.

The first service should include:

AXS drivetrain firmware and function check
Derailleur adjustment
Brake-pad and rotor inspection
Wheel-spoke tension
Headset adjustment
Crank and bottom-bracket inspection
KingPin pivot inspection
Thru-axle inspection
Tyre seating and pressure
Tubeless sealant inspection
General torque check

KingPin Care

KingPin does not use a conventional air shock, but its pivot hardware and surrounding frame areas should still be inspected regularly.

Check for:

Unusual movement or noise
Loose pivot hardware
Visible frame damage
Contamination around the pivot
Changes in rear-end alignment
Contact between accessories and moving frame sections

KingPin hardware should be serviced and tightened only according to Cannondale’s specified procedures and torque values.

Carbon Frame and Fork Care

Inspect the frame, fork, carbon wheels and seatpost after any significant crash or impact. Stop riding if cracks, soft areas, deep scoring, exposed fibres or unusual noises appear.

Do not clamp the carbon frame in a workshop stand. Clamp the seatpost using clean, appropriate jaws and suitable pressure.

Use protective film beneath frame bags and straps. Fine dust trapped beneath moving luggage can damage the finish over time.

AXS Battery Care

Charge the removable derailleur battery before longer rides and events. Carrying a charged compatible spare is sensible for remote or multi-day riding.

Keep battery terminals clean and dry. Confirm that the battery is securely latched after transport, washing or charging.

Tubeless Maintenance

Check tyre pressure before every ride and inspect sealant approximately every two to four months. Hot Australian conditions can cause sealant to dry more quickly.

After rough rides:

Inspect the tread and sidewalls.
Check the rims for impact damage.
Confirm that both tyre beads remain seated.
Remove embedded debris carefully.
Renew sealant when required.

Wheel and Hub Maintenance

Inspect the Reserve carbon rims after heavy impacts. Check spoke tension and wheel trueness periodically, particularly after rocky rides or loaded bikepacking trips.

The DT Swiss rear hub’s ratchet system should be serviced using the correct lubricant and procedure. Excessive grease can impair engagement, while unsuitable lubricants may reduce performance.

Warranty

Cannondale provides a limited lifetime frame warranty to the original retail purchaser, subject to product registration, proof of purchase and the applicable warranty terms. Cannondale-branded components generally receive one year of coverage, while SRAM, Reserve, DT Swiss, WTB, Easton and Fizik components may carry separate manufacturer warranties.

Gran Fondo published its first-ride review of the third-generation Cannondale Topstone Carbon platform on 11 March 2025. Its test bike was the suspension-fork-equipped Topstone Carbon 1 Lefty AXS rather than the rigid-fork Cannondale Topstone Carbon 1 AXS, so observations relating specifically to the Lefty fork should not be transferred directly to this model.

The review praised the platform’s confident, intuitive handling, high comfort and considerable versatility. It found that the KingPin rear system worked particularly well over rough gravel, while the frame’s broad capability allowed it to move comfortably between quick after-work rides, long weekends and bikepacking adventures.

Cannondale Topstone Carbon 2 GRX 2x

Best for: Riders combining substantial road mileage with gravel and wanting close gear spacing.

Advantages:

Shimano GRX 2x drivetrain
Smaller cadence changes
Broad total gearing
High road-speed capability
Mechanical shifting does not require charging
Well suited to fast all-road riding

Considerations:

Front derailleur adds complexity
More components require cleaning and adjustment
More shifting decisions on rapidly changing terrain
Lowest gear may not match the 10-52T AXS setup
Less appealing for riders prioritising simple 1x operation

The GRX 2x version better serves road-heavy riders. The Cannondale Topstone Carbon 2 AXS 1x is more convincing for rough gravel, bikepacking and cyclists who want uncomplicated electronic shifting.

Cannondale Topstone Carbon 1 Lefty AXS

Best for: Riders regularly tackling rocky tracks, rough descents and light singletrack.

Advantages:

Lefty Oliver front suspension
KingPin rear suspension
Excellent control over repeated impacts
Strong technical-terrain capability
Premium electronic drivetrain
High-quality wheel package

Considerations:

Higher purchase price
Additional fork service requirements
Lower fork tyre clearance than the rigid model
More specialised front-hub and fork servicing
Added weight and complexity
Excess capability for smoother gravel routes

The Lefty model is better for genuinely technical terrain. The rigid Cannondale Topstone Carbon 2 AXS 1x is the more versatile choice for mixed road, gravel and bikepacking use.

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