The Zipp 303 S Firecrest Tubeless Carbon Centre Lock Disc Brake Rear Wheelset is designed for versatility and speed. It features a 45mm rim depth and a wider internal width for enhanced performance and ride quality. Suitable for various road surfaces, the 303 S has a new rim profile optimized for modern bikes. It’s tubeless for disc-brake bikes, allowing wide tires at lower pressures for speed on or off-road. Among Zipp’s lightest, it’s optimized for aero performance with a 28mm tire and can handle gravel tires up to 50mm. The design reduces wind resistance, rolling resistance, rider fatigue, and weight. The rim is 2mm wider at 27mm, with a 23mm tire bed, designed for speed with a 28mm tire. This setup reduces rolling resistance and enhances ride comfort, offering a 10% watt savings at 40kph on smooth roads. The wheelset also features new aesthetics and is competitively priced.