"Shimano Dura Ace FC-R9200" and FC-R9200-P 2x12-speed chainring.
The 110 mm bolt circle diameter rings ensure fast and smooth shifting. To optimize weight, the models also feature Hollowglide construction.
Material:
- outer: aluminium (anodized), carbon fiber reinforced plastic (CFRP)
- inner: aluminium (anodized)

