Shimano Dura-Ace FC-R9200 12 Speed Chainring Size:52t The Thomson X2 features a

The Thomson X2 features a lighter

the question was not about carbon

with a larger C-shape

The design of each wheel component enables maximum aerodynamic penetration

Shimano Dura-Ace FC-R9200 12 Speed Chainring Size:52t The Thomson X2 features aWith their special tooth profiles, mount pins and climbing aids, Shimano Dura Ace FC R9200 12 Speed Chainrings enable a particularly smooth and fast shifting process. Shifting under load, as one would otherwise only expect from a rear derailleur, is possible without issue. The carbon fiber reinforced plastic construction with aluminum teeth helps keep weight down while increasing torsional rigidity, and the Hollowglide profile of the large chainrings