公开(公告)号：US20230271675A1

公开(公告)日：2023-08-31

申请号：US18143918

申请日：2023-05-05

Applicant: World Bicycle Rellef, NFP

Inventor： Brian Jordan

IPC: B62M25/06 ,  B62M9/04 ,  B62M9/10 ,  B62M9/00

CPC classification number: B62M25/06 ,  B62M9/00 ,  B62M9/04 ,  B62M9/10 ,  B62M9/105

Abstract: A system and method for simple transmission of a multi-speed bicycle is provided. A bicycle can have a transmission that can be toggled by a kickback shifting mechanism. A rear wheel hub can support a freewheel having a high speed gear sprocket and a low speed gear sprocket with dedicated chains to create dedicated gear-shifting. Rotating the pedal shaft in the non-drive direction approximately one-quarter rotation can toggle the transmission between the first gear ratio and the second gear ratio with a shifting surface that alternately allows driving engagement of the high speed gear sprocket with the rear wheel driver.