Zipp 202 Firecrest Carbon Rim - 700 Disc Brake Matte Carbon 24H Front/RearZipp 202 Firecrest Carbon Rim 700 Disc Brake Matte Carbon 24H Front Rear. The Zipp 202 Firecrest Carbon tubeless rim retains its 32mm rim depth for a classic feel with real aero benefits. The wheels 21mm internal width is aerodynamically optimized for use with 28mm wide tires. Its tubeless design lets you run lower tire pressures for improved grip and rolling resistance without the risk of pinch flats. Firecrest rim technology provides world class