| 摘要 |
Computer for a bicycle includes a speed change with a chain transmission, including a plurality of front crown wheels (16) which can be driven in rotation by a pair of pedal cranks (18) and a plurality of rear sprockets (20), a first sensor (30) for providing an electric signal indicating the speed of rotation of one wheel of the bicycle, a second sensor (32) for providing an electric signal indicating the speed of rotation of the pedal cranks (18), and a third sensor (38) for providing an electric signal indicating which is the selected front crown wheel. The computer has a display (24) for displaying riding information of the bicycle, and an electronic control programmed so as to determine the number of teeth (Zp) of the selected rear sprocket as a function of said signals and as a function of stored data indicating the number of teeth (Zc) of the front crown wheels (16).
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