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Racing Zero Competizione DB C19 Disc Center Lock wheelset by Fulcrum - innovation at its best
The Fulcrum Racing Zero Competizione DB C19 Disc Center Lock wheelset combines a 19 mm internal width with the 2-Way Fit rim profile, allowing the fitting of tubeless tyres of 23 mm and more. The installed CULT™ bearings contain high-quality ceramic balls with extremely precise surfaces, which, thanks to the lack of grease, result in a drastic reduction of the friction coefficient and thus increase the smoothness of the wheels. The Fulcrum 2:1 lacing pattern guarantees a symmetrical ride despite the asymmetrical design, making the wheel more responsive to acceleration.
Wheel Size: 28"
Tyre Type: clincher
Number of Spokes: 21
Brake Type: disc Center Lock (AFS Axle System™)
Tubeless System: 2-Way Fit
Technical Information - Rim:
Dimensions (ETRTO): 19-622
Inner Width: 19 mm
Outer Width: 23.8 mm
Depth: 30 mm
Rim Material: aluminium
Technical Information - Front Hub:
Over Locknut Dimension: 12 x 100 mm thru-axle
Body Material: carbon
Technical Information - Rear Hub:
Over Locknut Dimension: 12 x 142 mm thru-axle
Body Material: aluminium
Technical Information - Lacing:
Front Lacing Pattern: 2:1 Two-to-One™ (left 14 / right 7)
Rear Lacing Pattern: 2:1 Two-to-One (right 7 / left 14)
Spoke Type: aero, with straight head
Spoke Material: aluminium
Nipple Material: aluminium
Weight Limit: 120 kg (system weight)
Recommended Tyre Width: 23 - 40 mm
- ASTM category 2: for use on roads, maintained dirt roads and gravel roads (on Touring and Cross Country bikes) with jumps up to a height of 15 cm
- CULT ceramic bearings
- oversized aluminium flanks
- rim mad of 6082, T6 pre-aged aluminium, triple milled
- incl. DRP kit, an additional seal kit to protect the bearings from rain, mud or dust during Gravel or CX use
Tubeless technology was first used in the automotive sector, then in motorcycles and finally in bicycles. After entering the MTB world, the time has come for their use on the road: Fulcrum has developed the 2-Way Fit technology to guarantee the perfect compatibility of Fulcrum tubeless rims even with normal clincher tyres with tubes. 2-Way Fit wheels are particularly versatile and therefore perfectly suited to every situation. Thanks to a special marking in the valve area, the tubes are mounted with high precision and the tube remains firmly stabilized in the clincher tire. The valve for tubeless tyres can also be used safely. This offers the undeniable advantage that air can never penetrate during assembly due to inaccurate positioning.
The advantages are undisputed: tests have shown an incomparably high increase in smoothness. The absence of a tube prevents friction with the tyre and the perfect adhesion of the tyre to the rim prevents energy loss. A tubeless tyre cannot lose air abruptly through a hole and suddenly become flat, which is a clear safety advantage. There is also no danger of snake bites, as there is no tube that can be punctured.
What about a flat tyre? Don't worry! One of the advantages of the Fulcrum 2-Way Fit system is the possibility of removing the tubeless valve and inserting a normal tube to get you home.
AFS Axle System™
The Axial Fixing System is the solution developed by Fulcrum to mount the disc rotor to the hub. The connection provided by the stop surface of the mount is greater than that of the already known standards, allowing greater structural rigidity and therefore more precise and efficient braking.
Anti Rotation System™
This system takes the concept of the lacing system to a new level of performance. Fulcrum's technicians have redesigned the spokes and hub shells to create a strong and solid unit. In this way, the spokes a) never lose their initial tension, keeping the wheel perfectly reactive and trued, and b) remain in the position developed in the wind tunnel to ensure the best possible aerodynamics.
CULT stands for Ceramic Ultimate Level Technology. It is the technology developed, carefully perfected and then exclusively used by Fulcrum.
CULT is based on the exclusive stainless steel Cronitect®, a product of " Advanced by FAG" , part of the Schaeffler Group, and is used in the manufacturing of ball bearing surfaces.
It is an extremely hard and corrosion-resistant stainless steel, in which the upper layer is made particularly resistant to corrosion by means of a thermochemical machining process.
The end result? Amazing: The wheels with CULT bearings/balls are even nine times smoother running than those with conventional bearings. An advantage that can easily be translated into a great plus in terms of energy saving and in terms of reducing the number of seconds, if not minutes.
At the moment when the rider pedals at full power, the rotation of the cassette causes the spokes on the freehub side to give way, resulting in a loss of rim tension. This causes excessive bending of the whole and this inevitably means a loss of energy. Fulcrum has solved this classic problem in cycling with its 2:1 Two-to-One Spoke Ratio patent, that is, with twice the number of spokes in critical areas. In this way, two spokes take over the task of one, the yielding and twisting of the wheel remains low and the transmission of the athlete's energy becomes much more efficient. Thanks to this patent, the spoke tensions are more balanced and the fatigue strength of rim, hub and spokes is much higher.
- Rims: black with black decals
- Hubs: black
- Spokes: black
- Nipple: black
28" set (front 12x100 + rear 12x142) Shimano:
Freehub: Shimano Road
Note: Assembly of 8-/9-/10-speed cassettes on Shimano Road freehub bodies requires a 1.85 mm spacer.
Manufacturer Part Number: R0-20DFR22ASCO
28" set (front 12x100 + rear 12x142) SRAM XDR:
Freehub: SRAM XDR
Note: A 1.8 mm spacer is required to mount XD cassettes on an XDR freehub.
Manufacturer Part Number: R0-20DFR22AXCO
28" set (front 12x100 + rear 12x142) Campy:
Manufacturer Part Number: R0-20DFR22ACCO
- 1 x Fulcrum Racing Zero Competizione DB C19 wheelset (front and rear)
- 2 x Fulcrum 2-Way Fit valves
- 1 x Fulcrum DRP kit