Cannondale C1 Conceal Alloy Stem (-6 deg)

£108.00 GBP

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The Cannondale C1 Conceal Alloy -6 Degree Stem is a smart-value cockpit upgrade that combines strong 7075 aluminium construction, flexible handlebar compatibility and discreet cable routing for a clean, responsive setup suited to Australian road, gravel and cross-country riding.

Cannondale C1 Conceal Alloy Stem Features

Internal or semi-internal cable routing creates a cleaner, more aerodynamic cockpit
Strong 7075 aluminium construction provides reliable steering stiffness
Standard 31.8 mm handlebar clamp accommodates a wide selection of road and mountain bike handlebars
Seven stem lengths make it easier to refine reach and overall bike fit
Optimised for Cannondale’s Delta Steerer system, with 5, 10 and 15 mm spacers included

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Material: 7075 aluminium alloy

Colour: Black

Stem angle: -6 degrees

Available Australian lengths:

80 mm
90 mm
100 mm
110 mm
120 mm
130 mm
140 mm

Additional 60 and 70 mm versions are listed in some overseas catalogues, but these may not be part of Cannondale Australia’s regular range. An Australian retailer identifies its 70 mm option as a special-order product.

Handlebar clamp diameter: 31.8 mm

Claimed weight: 210 g for the 110 mm version

Cable routing:

Fully internal on compatible systems
Semi-internal where the bicycle permits the hoses or cables to run beneath the stem

Steerer integration: Optimised for Cannondale Delta Steerer systems

Included spacer sizes:

5 mm
10 mm
15 mm

7075 aluminium construction

The Cannondale C1 Conceal Alloy Stem is manufactured from 7075 aluminium, an alloy commonly selected for premium bicycle components requiring high strength and dependable stiffness.

Compared with basic alloy stems, the C1 Conceal places greater emphasis on integrated cable management and clean frame-to-cockpit presentation. Its 210 g claimed weight is not class-leading among conventional alloy road stems, but the figure needs to be considered in the context of its concealed-routing structure and integration hardware.

Delta Steerer integration

The Cannondale C1 Conceal Alloy Stem is designed to integrate neatly with the brand’s Delta Steerer platform. On a compatible bicycle, hydraulic hoses and electronic wires can be guided into the frame while the shaped spacers form a smooth transition between the stem and head tube.

The included 5, 10 and 15 mm spacers provide several options for adjusting handlebar height. This makes the cockpit more adaptable than a one-piece integrated handlebar, although changing the spacer arrangement can still involve hydraulic hose and headset considerations.

Universal round handlebar interface

A standard 31.8 mm clamp allows the stem to be paired with many compatible aluminium or carbon handlebars. Riders can change handlebar width, reach, flare or material without replacing the stem.

This modular format is an important advantage over a one-piece cockpit because it allows the handlebar and stem to be adjusted independently. It also makes it easier to replace a damaged bar, experiment with a narrower road position or install a flared gravel handlebar.

Available Australian stem lengths

80 mm
90 mm
100 mm
110 mm
120 mm
130 mm
140 mm

Stem angle: -6 degrees

Handlebar clamp diameter: 31.8 mm

Choosing the correct length

An 80 or 90 mm stem can provide a more compact riding position and faster-feeling steering. These sizes may suit smaller riders, compact frame geometries, gravel bikes or cyclists seeking to reduce an overly stretched position.

A 100 or 110 mm stem represents a common performance-road range. These lengths generally balance cockpit reach, front-wheel loading and controlled steering, although the correct measurement depends entirely on the rider and frame geometry.

A 120 to 140 mm stem creates a longer cockpit and places more weight over the front wheel. These sizes are most relevant to riders with a professionally established race position or bicycles with relatively short frame reach.

The Cannondale C1 Conceal Alloy Stem is best suited to Australian road and gravel riders who want a cleaner cockpit without committing to the cost or fixed geometry of a one-piece carbon system.

Installing a carbon handlebar

The stem uses a 31.8 mm clamp and may be compatible with suitable carbon handlebars. Confirm the handlebar manufacturer’s clamping requirements before installation.

Use carbon assembly compound only where specified. Tighten the faceplate bolts gradually and evenly using the correct cross-pattern sequence. Do not exceed the lower of the torque limits stated by the stem and handlebar manufacturers.

Routine inspection

Regularly inspect:

Faceplate bolts
Steerer-clamp bolts
Handlebar position
Headset preload
Spacer alignment
Cable or hose contact points
Routing covers
Accessory-mount hardware
Signs of corrosion
Cracks, dents or impact marks

Check the stem following a crash, heavy impact or transport incident. Replace any part with suspected structural damage rather than attempting to straighten or repair it.

Cleaning

Clean with mild bicycle wash, fresh water and a soft cloth. Pay particular attention after wet rides or exposure to coastal conditions.

Avoid directing high-pressure water into the headset or routing ports. Remove perspiration and salt residue regularly, particularly around faceplate bolts and exposed hardware.

Warranty

Cannondale currently covers Cannondale-branded components against eligible manufacturing defects for one year from the original retail purchase date.

Velo, June 2023

Velo’s review of the fourth-generation Cannondale SuperSix EVO praised the complete bike as a highly capable road-racing platform with balanced handling and a notably clean cockpit. The C1 Conceal stem was part of Cannondale’s modular alternative to a one-piece SystemBar, allowing riders to retain integrated routing while choosing a separate handlebar.

This distinction is important for owners who want a performance cockpit but are not ready to lock themselves into fixed integrated dimensions. The modular design allows stem length and handlebar shape to be changed independently while maintaining much of the streamlined appearance expected from a modern race bike.

Zipp Service Course SL Stem

The Zipp Service Course SL is a premium 7075 aluminium stem with a claimed weight of 135 g for the 100 mm, ±6-degree version. It is available in numerous lengths and both ±6 and ±17-degree configurations.

Cannondale C1 Conceal advantages:

Integrated and semi-integrated routing options
Delta Steerer optimisation
Included Cannondale headset spacers
Cleaner appearance on compatible Cannondale frames
More cohesive frame-to-cockpit transition

Zipp Service Course SL advantages:

Approximately 75 g lighter based on representative published weights
Broader frame compatibility
More angle options
Titanium hardware
Easier installation on conventional cockpits

The Zipp is the better choice for a traditional externally routed bike or a weight-focused build. The Cannondale stem is more compelling when concealed routing and Cannondale integration are the priorities.

FSA SMR Stem

The FSA SMR is designed to support concealed or semi-integrated routing on compatible frames while retaining a replaceable handlebar and stem arrangement.

Cannondale C1 Conceal advantages:

Designed specifically around Cannondale integration
Delta Steerer spacer support
Cleaner factory appearance on compatible Cannondale bikes
Known fit within the intended Cannondale ecosystem

FSA SMR advantages:

Available for a wider variety of frames
Strong aftermarket routing support
Useful for multi-brand custom builds
More appropriate when the bicycle does not use a Delta Steerer

The FSA is the more adaptable aftermarket option. The Cannondale C1 Conceal is preferable when the bike was designed around Cannondale’s headset and routing hardware.