If you own a higher-end road or mountain bike with a Shimano drivetrain, then chances are it's got a "secret" storage compartment: the hollow space in the axle, that connects the Shimano Hollowtech ...

A broken freehub is usually made apparent by the loss of power to the back wheel when pedaling. While many freehubs can be serviced, it's easier to just replace basic Shimano models. Before you start, ...