The Fulcrum Speed 55T Disc Brake Carbon Tubular wheels offer amazing stability thanks to their wide profile, which optimises aerodynamic flow to keep the wheel stable, removing any interference.
Short bursts out of the saddle are incredibly easy thanks to the stiffness of the spokes in addition to the two oversize flanges and the Two-to-one spoke pattern. This is just a taster of the kind of experience you get when you ride a bicycle with full-carbon Speed 55T DB wheels.
The full-carbon rim for tubular tyres with its new layers of "longitudinal twill" transfers 10% more power than previous models, for greater power transmission efficiency. And all that despite their record weight. Every single feature of these wheels is taken to the extreme.
It's simply made for racing. Improvements within the group will be immediately noticeable. And sought-after.
SPEED 55 T DB is the most extreme wheel of the Fulcrum range, combining all the advantages of a 55mm aerodynamic rim with a powerful disc during braking, characteristics which make this the ideal racing wheel. This model is recommended for expert cyclists who are able to handle its deep profile and be daring with their lines and when accelerating: on these kinds of terrain it'll be impossible to hold back your excitement at the features of these wheels.
Ceramic Ultimate Level Technology (CULT) - Behind this project is the exclusiveness of Cronitect steel, using “Advanced by FAG” technology by Schaeffler Group employed for the bearing races. This steel is resistent to the corrosion of the highest level until the point that no grease is necessary for lubrication, maybe just a small amount of oil.
The top quality ceramic balls, thanks to the absence of lubricating grease and the precision machine of the cup and cone technology, allow to reduce the friction coefficient drastically and then increase the smoothness of triathlon and road bike wheels by as much as 9 times compared to standard bearings.
An outstanding result achieved by using cutting-edge technologies in the field of materials processing.
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.
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.
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.
DRSC - Directionated Rim - Spoke Coupling - Exclusive rim/spoke coupling system. It allows the rim, spokes, nipples and hub to align properly with the same tensioning value in all areas.
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.
F.I.C. Fulcrum Identification Card - 100% Handmade Quality - 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 - A guarantee of quality
The keyword for their products is: traceable.
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.
All this because, devoted to its mission, Fulcrum demands the absolute perfection and safety for its customers.
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.
Rim Full Carbon Technology - Full carbon Fulcrum rims are built using combinations, developed in the laboratory, of different types of fibre, including UD and the famous 90-degree 3K of models at the top of their range.
To build them they developed a special HTG (high transition grade) resin, whose glass transition point is at a higher temperature than any other fibre used in the bicycle industry.
This gives incomparable performance when 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.
Unrilled Rim Bed - No holes on the bridge connector means that the rim is uniform at every point, free from critical areas subject to stress.
The advantages are immediately clear: less weight, longer lasting rims, greater resistance to fatigue, the possibility of giving the spokes more tension and more stiffness which, in terms of performance, means improved responsiveness and acceleration.
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.
Disc Specific Rim - Fulcrum is one of the first wheel manufacturers on the market to offer two completely different rim profiles from disc to conventional brake. So, no adaptation, but a rim conceived based on years of design experience.
Not requiring a braking track, Fulcrum’s R&D department designed a completely new profile, aimed at saving every single gram of weight and at improving aerodynamic efficiency.
Its greater width makes it a perfect fit for tyres of 25/28mm upwards.
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.
Tyre Type: Tubular
Tyre Size: 28"
Rim Material: Carbon
Rim Material Details: Full Carbon, "Twill" - Carbon Fiber Finishing
Rim Height Category: High
Rim Height: Front And Rear 55mm
Rim Width: 26.5mm
Tyre Width: From 25mm
Braking System: Disc Brake
Braking Options: 6 Bolts Or AFS
Front Axle Compatibility: HH12 - 100
Rear Axle Compatibility: HH12 - 142
Front Wheel Spokes: 21, Two To One (14 Left + 7 Right)
Rear Wheel Spokes: 21, Two To One (7 Left + 14 Right)
Spokes Material: Stainless Steel, Double Butted
Spokes Profile Technology: Aero, Straight Pull
Front Hub: Carbon, Aluminum Oversize Flange
Rear Hub: Aluminum, Aluminum Oversize Flange
Bearings: Cult Ceramic Bearings. Adjustable Cup & Cones Bearing System
Others: Plasma Treated HG Freewheel. Aluminum Axle
Weight Limit: 109kg (Cyclist)
Fwb Version: HG11, Optional: Campy,XD
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.