| 摘要 |
A chain guide for the front derailleur of a bicycle has a first plate intended to shift a chain from a first toothed crown with a diameter to a second toothed crown with a larger diameter, a second plate facing the first plate and intended to shift the chain from the second toothed crown to the first toothed crown and a connection between the first plate and the second plate. The first plate has a first thrusting portion for shifting the chain from the first toothed crown to the second toothed crown. The first thrusting portion is defined on a projection that is defined at a first portion of the first plate and has a lower profile that projects with respect to the lower profile of the remaining portion of the first plate. It is thus possible to minimize the size of the other portions of the first plate, thus achieving a weight reduction of the chain guide, without altering its performance or reducing its structural strength.
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