A crank arm fixing ring is basically provided with a cylindrical mounting portion and a contact portion. The cylindrical mounting portion includes an external thread configured to screw into a crankshaft. The contact portion extends radially outwardly from the cylindrical mounting portion. The contact portion is configured to contact a crank arm upon attachment of the crank arm with the crank arm fixing ring. The contact portion includes at least one cutout extending radially outwardly from the cylindrical mounting portion. The at least one cutout is configured to receive a transmission line extending through the cylindrical mounting portion.
BICYCLE CRANK ASSEMBLY
2018-05-31
Patent
Electronic Resource
English
IPC: | B62M RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES , Antrieb von Radfahrzeugen oder Schlitten durch den Fahrer |