Zipp 302 carbon clincher rear road wheelzipps 302 carbon clincher rear road wheel is constructed from a carbon fibre thats produced in zipps very own factory ensuring they have complete control of the manufacturing process the 45mm deep section rim has been designed to minimise aerodynamic drag and improve handling and stability meaning the 302 rear wheel offers you the ride quality that zipp wheels are known and loved for but at a more attainable price point fast light and toughthe 30