RIDEA RD6 Big / Oversized Pulley 16x20 for Shimano
Large diameter pulley reduces load and achieves better power efficiency
Proprietary narrow wide design "X-ODON" technology is adopted for the tooth tip of the pulley
Delivers smooth shifting and wattage savings
Compact upper pulley optimizes shifting performance
Carbon pulley reduces chain noise
A full ceramic type that uses ceramic materials for both the ball and race is also available.
Cage Material: carbon composite
Bearing: full ceramic
Compatible with: DURA-ACE R9250, ULTEGRA R8150 (12S), DURA-ACE R91xx & ULTEGRA R80xx (11S)