The Zipp 303 S disc brake wheelset offers modern road and gravel bike riders the versatility and speed they need to reach their top speeds.The wheelset maintains its ideal rim height of 45 mm and features an inner width of 23 mm. The 303 S is one of Zipp's lightest wheels, optimized with a 28mm tire for maximum aero performance, but can also be ridden with gravel tires up to 50mm wide. The overall 27mm wide rim, which is also tubeless capable, optimizes the tire shape to allow for lower tire pressure. This reduces rolling resistance and allows for a savings of 10 watts over a comparable high-end wheelset in the total power required to ride 40 km/h on a flat road with a 28 mm tire. In addition, the Zipp 303 S come in a completely optic. Axle system: VR 12x100 mm. Version: front. Axle standard: thru axle. Intended use: road bike. Maximum tire pressure 73 psi. Maximum rider weight 113 kg Front hub. Type: 76D. Front axle diameter: 12 mm. Features: for thru axle. Spoke count: 24. Installation width: 100 mm. Type: hollow chamber. Mouth width: 23 mm. Tyre type: clincher. Tread height: medium (30 - 50mm). Height: 45. tubeless compatible. Braking system: Disc brake. Material: Carbon. Width: 27 mm. Size (in inches): 28 inch. Included in delivery: Centerlock. Locking ring, tubeless valve, valve wrench, tubeless rim tape Spokes. Construction: Spokes: CX-Sprint / nipples: Sapim Secure-Loc. Lacing: 2 crossings. Front wheel. Designed for brake type: disc brake. Center Lock. Weight: 711 g.