The aim was clear - to design a wheel for disc brakes with the soul of a “Racing Zero”.
Creating it was less easy, given the premises and the myth it referred to.
Fulcrum believe they have succeeded, developing a design along the same lines as that of conventional brakes.
The riding experience is the same, exactly similar and equally exhilarating, until you come to the extreme rush at a hairpin bend.
2-Way Fit - 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.
Rim Dynamic Balance (RDB) - The concept is simple and elegant: balance the weight of the gasket, with an item of similar weight placed on the exact opposite side.
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 their 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.
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.
2:1 Two-to-One -Spoke Ratio - Disc Brake - A system that is as simple as it is effective, the result of the ingenuity of Fulcrum engineers and attentive observation of the results of the tests performed on the wheels on a daily basis.
These tests made it possible to understand that the forces that act on the sides of the wheels, and therefore on the spokes, are extremely different; but what’s more, the differences between the front and rear wheels are also evident and significant. The front wheel, in fact, has to remain stable even during braking of the disk on the left side, and the rear wheel, in addition to the sprocket set, has to compensate for the traction of the force on the chain side.
MOMAG - A magnet and lots of ingenuity. This was what led to the patent for the well-tested “Mounting Magnet” system, or MoMag.
Anti-Rotation System - This new system raises the concept of spoking to a new level of performance for road bike and triathlon wheels.
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.
Fulcrum Identification Card - 100% Handmade Quality (F.I.C.) - Right from its inception Fulcrum has been marked by feature that continues to this day: that is to design, prototype and industrialise all the wheels characterised by the red “F”.
Indeed these take shape inside of the R&D, the leading-edge department that represents the beating heart of the Italian company.
Every single component of the wheel, the materials chosen and the technologies applied are the tangible result of the effort that Fulcrum makes every day to give you maximum performance and reliability.
Traceability - If you find a little label attached to any Fulcrum product, do not remove it. It will provide you a guarantee in case of an ascertained defectiveness of a production batch, and so the component needed or wheel will be traceable.
AFS Axle System - The Axial Fixing System is the solution developed by Fulcrum® to fix the disc brake to the hub. The constraint granted by the butt area of the release mechanism, greater than in familiar standard ones, makes it possible to obtain greater structural rigidity and therefore more precise and powerful braking.
Wide Rim Tech - Fulcrum’s R&D department, following requests from the competition circuit, has worked to create rims that are wider than before, about 4 mm or more than previously. This technical choice provides an ideal basis for 25/28mm tyres, the sizes currently popular.
This ensures stability, excellent handling and superior comfort.
Cup and Cone - The cup-and-cone bearing differs from the classic cartridge bearing because it works in perfect alignment with the forces involved, weight and thrust from the frame, as the bearings run in a race positioned directly opposing these forces.
High Strength Aluminum - Special aluminium - the best aluminium wheels require carefully chosen materials. For "High strength Aluminum", Fulcrum R&D uses only the best aluminium alloy 6082, with artificial ageing T6 temper that stabilises the alloy and gives it maximum life and reliability.
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.
Oversize Flange - The Oversize Flange was developed from the need to create a system to transmit every watt to the ground without dispersion, stiffening the wheel system where necessary, without having to add spokes or superstructures that increase weight.
The oversize flange uses physics to solve the problem. It increases dishing and enables spokes to be shortened. Doubling the spokes creates a balanced system that is excellent at transmitting torque.
Monoblock Hub for Disc - The rear hub of a top-quality disc brake wheel is a technical problem to be solved. Fulcrum’s R&D department found itself facing a fundamental choice: on which side to put the oversize flange of the Two-to-one system? Disc or sprocket side? Without question - must stay on the sprocket side.
To combat the loss of braking power from flex and torque of the connector between the two sides of the hub, a special one-piece system has been devised with internal stiffening ribs.
One Hub Fits All - This solution responds to the need to fit the various axis standard on the market, with speed and ease. Different adaptors mean that the wheel is ready to mount on your bike in just a few steps.
Rim - New aluminum rim with a wider section: ETRTO 19C, external width 23.8 mm.
The special milling makes it possible to reduce the peripheral weight of these road bike rims and to increase the reactivity of the wheels.
Hubs and Flange - Racing Zero DB’s new disc brake hubs are the result of years of experience in wheel design.
They have used oversize flanges to balance braking and accelerating forces, and Two-to-One™ double spokes to guarantee solidity and reactivity when racing.
Quick release or thru axle? Disc brake frames can fit various standards. Racing Zero DB can be fitted to any frame, quickly and easily, thanks to simple adaptors.
USB - Ultra Smooth Bearings - USB ceramic bearings with top-performing cone-cup technology.
The cap and cone technology maintains the most efficient angle of contact between the bearings and bearing seat, increasing the smoothness and durability.
Spokes and Nipples - Aluminum spokes: a precise choice to ensure optimal rigidity and a special attention to aerodynamics.
Aluminum nipples: thanks to the light weight they reduce the peripheral mass, enemy of reactivity.
Tyre Type: 2way-fit (For Clincher And Tubeless)
Tyre Size: 28"
Rim Material: Aluminum
Rim Material Details: Aluminium (6082, T6 Pre-aging), Triple Milling
Rim Height Category: Low
Rim Height: Front And Rear: 30mm
Rim Width: 23,8 Mm, Etrto 19c
Tyre Width : From 23 Mm To 50mm
Braking System: Disc Brake
Braking Surface/braking Options: 6 Bolts Or Afs
Front Axle Compatibility: Qr/hh15/hh12
Rear Axle Compatibility: Qr/hh12
Front Wheel Spokes: 21 (14 Left + 7 Right), Two To One
Rear Wheel Spokes: 21 (7 Left + 14 Right), Two To One
Spokes Material: Aluminum
Spokes Profile Technology: Aero, Straight Pull
Front Hub: Carbon, Aluminum Oversize Flange
Rear Hub: Aluminum, Aluminum Oversize Flange
Bearings: USB Ceramic Bearings. Adjustable Cup & Cones Bearing System
Others: Plasma Treated Hg Freewheel. Aluminum Axle. Xd Compatible
Weight Limit: 109kg (Cyclist)
Fulcrum Wheels s.r.l. designs wheels and components for racing bikes and distributes them in over 30 countries worldwide. They were based on the idea of three aerospace engineers who are passionate about bicycles. The strong points of this young company include the use of unique patents, ongoing technological research, and the attractive and young-spirited design.