Thanks to the 34mm medium profile, the new Racing 4 DB wheels achieve the perfect balance between aerodynamics, riding precision and versatility. They are ideal for climbing without sacrificing stability once the speed increases on the descents. In fact these wheels have been chosen by the Cofidis team for their training setup. The aluminium rim profile of the new version has been CNC machined and lightened, and the inner rim width has been increased to 19 mm (the previous model was 17 mm wide) so that it can easily fit 25 mm tyres. The wheels also feature 2 Way Fit technology for clinchers and tubeless tyres (tubeless tape installed and valves included). Aesthetically the new Racing 4 DB line features striking laser etched graphics that will resist whatever the weather throws at them.Specifications:- Tyre type: 2-Way Fit™ Ready (Clincher/Tubeless ready)- Tyre size: 700c- Discipline: Road / Triathlon- ASTM Category: 2- Weight: 1710 g- Rim material: Aluminum- Profile height: Medium- Rim height: Front and rear 34 mm- Rim width: 24 mm- Inner rim width(channel): 19 mm- Braking system : Disc brake- Braking surface/ Brakes Options: AFS™- Front axle compatibility: HH12-100- Rear Axle compatibilty: HH12-142- Front wheel spokes: 24, Left 16 - Right 8- Rear wheel spokes: 24, Left 8 - Right 16- Spokes Material: Stainless steel- Spokes: Profile technology: Rounded, straight pull- Nipples: Aluminum- Front Hub: Aluminum, Aluminum flanges- Rear hub: Aluminum, Aluminum flanges- Bearings: Sealed cartridge bearings, adjustable- Others: Lasered + Stickers- Weight limit (system): 120 kg - FWB Version: HG, XDR, N3W Technology:Anti-Rotation System™:- This new system raises the concept of spoking to a new level of performance for 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:- Will never lose their initial tension, thus keeping the wheel perfectly reactive and centred- 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:- 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.Square Milling:- For the new Racing Zero's aluminium rim, we decided to keep the triple-milled structure throughout the profile to minimise aluminium thicknesses. Next, our technicians added 3D milling at the base of the spokes.- This means less material but the same reliability since, in this particular design, the forces are well distributed over the rim.- Triple and Square milling enable maximum weight reduction on the rim periphery, producing an extremely responsive wheel.