Racing 5 DB is a bicycle 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 aluminium wheelset begins from solid foundations that are brought up to date with the latest trends: The 17C groove is a perfect fit for the 25 mm clincher tyres, while the low asymmetrical profile of the wheels gives them agility and adds responsiveness, combined with almost effortless steering.
In addition to all this, R&D has included some technical details that are trademarks of Fulcrum's products: aside from asymmetry, which is important for balancing the forces exerted by the hubs, the discs and the cassette, these aluminium 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 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 (F.I.C.) - 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.
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.
2Way - Fit Ready (Road)
Tyre Type: 2-Way Fit Ready
Tyre Size: 28"
Rim Material: Aluminum
Rim Material Details: Aluminum, asymmetric
Rim Height Cateogry: Low
Rim Height: Front and rear 26 mm
Rim Width: 21,8 mm, ETRTO 17C
Tyre Width: From 25 mm to 50 mm
Braking System: AFS
FRONT AXLE COMPATIBILITY: QR / HH15-100 / HH12-100 (no skewers incl.)
REAR AXLE COMPATIBILITY: QR / HH12-142 (no skewers incl.)
Front Wheel Spokes: 24 (16 left + 8 right)
Rear Wheel Spokes: 24 (8 left + 16 right)
Spokes Material: Stainless steel
Spokes Profile Technology: Rounded, Straight pull
Front Hub: Aluminum, Aluminum flanges
Rear Hub: Aluminum, Aluminum flanges
Bearings: Sealed cartridge bearings
Weight Limit: 109 kg (Cyclist)
FWB Version HG11 optional: Campy, XD