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Racing 5 DB is a wheel that is all about substance and it certainly is brimming with it thanks to a series of key technical features that give this model versatility.
This aluminum wheelset begins from solid foundations that are brought up to date with the latest trends: The 17C groove is a perfect fit for 25 mm clincher tire, while the low asymmetrical profile of the wheels gives themagility and adds responsiveness, combined with almost effortless steering.
In addition to all this, these aluminum wheels have the added benefit of a straight head spoke structure for increased stiffness, reactivity, and power transfer.
ANTI-ROTATION SYSTEM™
This new system raises the concept of spoking to a new level of performance for a 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 centered
b) will remain in the position that has been studied in the wind tunnel tests to ensure the best aerodynamic penetration possible.
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.
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.
ASYMMETRIC RIM
The asymmetry is designed to improve rim tension, balancing the forces from brakes and sprocket cassette.
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.
