Fulcrum Racing Zero C17 2WF wheelset

The gold standard among high-level aluminum road bike wheels.

With the unmistakable character that everybody knows well, the absolute ability to transmit your energy on the asphalt, its extreme riding precision. Unrivaled in the peloton: extraordinary performance and high impact aesthetics make these road bike wheel the point of reference for cyclists. Race after race, Zero wheels have become synonymous with excellence, quality, performance, reliability… and now tubeless too!

Technical specifications

• Tyre type: 2-Way Fit Ready (for clincher and tubeless ready)
• Tyre size: 28"
• Discipline: road
• ASTM category: 1
• Rim material: Aluminium (6082, T6 Pre-Aged), triple milling, Square milling
• Profile height: low
• Rim height: Front: 27 mm - Rear: 30 mm
• Rim width: 22.5 mm
• Inner rim width (channel): ETRTO 17C
• Tyre width: From 23 mm to 38 mm
• Braking system: Caliper
• Aluminum braking surface, turned
• Front axle compatibility: QR
• Rear axle compatibility: QR
• Front spokes: 16 (8 left - 8 right)
• Rear spokes: 21, Two-to-one (7 left - 14 right)
• Spokes material: Aluminum
• Spokes profile: Aero, straight pull
• Nipples: aluminium
• Front hub: Carbon, Aluminum oversize flange
• Rear hub: Aluminum, Aluminum oversize flange
• Bearings: USB ceramic bearings. Adjustable Cup & Cones bearing system
• Other: Plasma treated HG freewheel. Aluminum Axle
• Weight limit: 120 kg (comprising cyclist, bike, equipment and luggage)
• FWB options: HG11, Campy
• Included: 2 tubeless valves and accessories, QR axles, magnet for spoke installation
• Real pair weight: 1480g

Useful documentation:

• Here you will find product catalogues, User Manuals, Technical Manuals, Video Tutorials and annual Spare Parts Catalogues.
• Here you will find the Fulcrum codes used to transform the specifications of a wheel.
• Here you will find the Fulcrum codes for the valve kits of each 2Way-Fit or 2Way-Fit Ready wheel.

Technologies

RDB™ Rim Dynamic Balance
The concept is as simple as it is ingenious: balance the mass of the rim joint with a mass of equal value positioned exactly on the opposite side. In top-of-the-range models, this is achieved by machining the rim section opposite the joint. In entry-level models, on the other hand, Dynamic Balance™ is achieved thanks to two oversized spokes located in the section opposite the joint, resulting in a perfectly balanced bdc wheel during rotation dynamics.

F.I.C. Fulcrum identification card - 100% handmade quality
Since its inception, Fulcrum has been distinguished by a characteristic that continues to this day: designing, prototyping and industrialising all types of wheels marked with a red "F", whether they are wheels for racing bikes, MTB wheels, cyclocross wheels or for triathlon competitions. These, in fact, take shape within the innovative R&D, the advanced department that is the beating heart of the Italian company. Every single component of the wheels, the materials chosen and the technologies applied are the tangible result of the effort Fulcrum® makes every day to give you maximum performance and reliability.

Specific nipple and nipple seat
7% more reliable. Such a small and yet such an important part, nipples and their seat are one of the most important topics in the design of a wheel. During the development of the new Fulcrum E-Mtb rims, a great deal of work was done on this aspect, the seat was redesigned and now makes it possible to completely eliminate nipple fatigue work. Thanks to a special housing, with lateral invitations on both sides, the nipple fits on a stable base, perfectly in position, oriented towards the spoke. As a result, the distribution of stresses in the rim is much more uniform, creating perceptible benefits in terms of fatigue life and stiffness: misalignments under stress and consequent deformation of the structure are avoided.

2-WAY FIT™
2-Way Fit™ profile for tubeless and clincher.
Tubeless technology was first used by the auto industry , then by motorcycles and now has reached the cycling industry. After its debut with mountain bikes the moment has come to “put it on the road”, and that’s what Fulcrum propose to do. Fulcrum has developed Fulcrum 2-Way Fit™ technology to ensure the perfect compatibility of Fulcrum tubeless rims with normal clincher types and tubes. 2-Way Fit™road bike wheels are perfectly multipurpose for tackling every situation. Thanks to a special impression in the valve area, the tubes are fitted with the maximum precision while keeping the tube perfectly stable inside the tyre. Housing the valve for tubeless tyres is also risk-free, with the unquestionable advantage that there are never any air infiltrations caused by non-ideal positioning when fitting.

USB™ - Ceramic ultra smooth bearings™
Fulcrum® has a long-standing reputation for the extremely high performance of its hubs in terms of smoothness and reliability.
In fact, all the projects are entirely developed in R&D department and they have put obsessive care into taking care of every detail. The hubs with USB™ ceramic bearings (Ultra Smooth Bearings) further enhance the triathlon and road bike wheels’ smoothness and reduce weight and the need for maintenance. Comparative tests have shown that USB™ bearings are 50% smoother than standard bearings. Now improving your performance during the race or simply going for a ride with your friends will be easier.

2:1 TWO-TO-ONE™
When you push on the pedals, the rotational force on the sprocket induces a slackening of the freewheel spokes with a consequent loss of rim tension. This results in undesirable flex of the whole wheel and an unavoidable loss of energy. Fulcrum® has solved this classic cycling problem with its 2:1 Two-to-One™ Spoke Ratio patent, by doubling the spokes in the critical zones. As a result there are two spokes which carry out the function of one, slackening and torsion are limited and the transfer of the athlete’s power is much more effective. Also, thanks to this system, spoke tensions are balanced more evenly between drive and non-drive sides and the fatigue life of the rim, hub and spokes is lengthened.

MOMAG™
What is MoMag™?
A magnet and lots of ingenuity. This was what led to the patent for the well-tested “Mounting Magnet” system, or MoMag™. How does it work? The nipples, once inserted inside the rim via the valve hole, are “guided” to the point of connection with the spoke by means of the magnet. This simple but ingenious system makes it possible to have wheels without holes on the upper bridge, but with spokes tensioned by traditional nipples!
The advantages: No holes on the rim means that the rim is uniform at every point, free from stress points or zones of weakness and, for the clincher profiles no rim tape is required, to the benefit of weight reduction. The advantages are immediately clear: greater rim lifetime, greater resistance to fatigue, the possibility to give the spokes greater tension, and greater stiffness which, in terms of performance, mean greater reactivity and acceleration.

ANTI-Rotation System™
This new system raises the concept of spoking to a new level of performance for road bike and triathlon wheels ( and mtb too)
The Fulcrum® engineers have redesigned the spokes and the hub housings to create a solid and unmoveable whole. The result is that the spokes: a) will never lose their initial tension, thus keeping the wheel perfectly reactive and centred; b) will remain in the position that have been studied in the wind tunnel tests to ensure the best aerodynamic penetration possible.

Square milling
For the new Racing Zero’s aluminium rim, Fulcrum decided to keep the triple-milled structure throughout the profile to minimise aluminium thicknesses. Next, Fulcrum technicians added 3D milling at the base of the spokes. This means less material but the same reliability since, in this particular design, the forces are well distributed over the rim. Triple and “Square” milling enable maximum weight reduction on the rim periphery, producing an extremely responsive wheel.

Differentiated rim height
Two different heights for front and back. A bigger challenge in construction, but necessary to achieve the very best. The lower front wheel improves handling, limiting weight to a maximum and also mass involved when turning and relaunching. The rear rim is higher and more solid, to transmit all the power to the wheel and increase stability.

Carbon hubs
In line with their aim to save every possible gram of weight and to choose the most advanced technological solutions, the R&D department has developed a seamless carbon hub. The fibre selected is woven at 90 degrees, for enhanced balance of torque when pedalling.

Plasma freehub
The Plasma treatment makes the aluminium especially hard and resistant to surface abrasion and wear. This has allowed thickness of materials to be reduced to a minimum, achieving advantages of lighter weight, while maintaining lifespan and reliability.