crankset front chainrings gear change mechanism bicycle top view |
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| navigate by keyword : assembly bicycle bike biking bottom bracket chain chainring chainset change closeup crankset cycle cycling cyclocross derailleur detail drive drivetrain fitness frame gear humanpowered means mechanism modern mountain part pedal pedaldriven physical power racing ratio recreation red singletrack speed system torque touring tourism traffic transmit transportation travel vehicle |
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| Crankset and pedal assembly, front chainrings and gear change mechanism of modern bicycle, top view close-up in selective focus |
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