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4 compounds in the tread (4C) for increased wear life
the question was not about carbon
The design of each wheel component enables maximum aerodynamic penetration
This is a case for the Schwalbe innovation hub
Shimano Dura-Ace FC-R9200 12 Speed Chainring Size:52t 4 compounds in the treadWith 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
