Shimano Dura-Ace 12-Speed 52T Chainring for FC-R9200/R9200-P RGroup_BAED8727B884C3A475F4090EC1A89DD3059947F4 The CushCore is a foam

The CushCore is a foam insert designed for mountain bike tires

adjustable pins for improved grip

foggy mornings

making it both fast and energy-efficient for climbing and descending mountains

With components like bleed blocks for different piston types and Shimano nipple pins

Shimano Dura-Ace 12-Speed 52T Chainring for FC-R9200/R9200-P RGroup_BAED8727B884C3A475F4090EC1A89DD3059947F4 The CushCore is a foamThe Shimano Dura Ace 12 Speed 52T Chainring for FC R9200 R9200 P is built for riders who want crisp, consistent front shifting and reliable power transfer. Designed with race ready Dura Ace road drivetrains in mind, it matches 12 speed setups and uses a secure 110mm PCD mounting design to help keep your chain tracking cleanly when the pace is on.