The Dura-Ace FC-R9200 chainrings, designed with Hollowglide technology, offer exceptionally smooth and fast shifting. The high rigidity hollow structure reduces weight without compromising strength. Constructed from aluminium and carbon fiber reinforced plastic, these chainrings are built for performance. They feature a chain line of 44.5mm and an asymmetrical bolt circle diameter of 110mm. The chainrings are anthracite in colour and are compatible with Shimano Dura-Ace FC-R9200 and FC-R9200-P cranksets.