Replacing a spoke on the road or replacing your cassette is virtually impossible without the rather bulky tools of a Chain whip and Cassette remover. The Pocket Cassette remover allows you to do the job in an emergency roadside with a tool smaller than a box of matches. It leverages against the frame and then uses the chain and the pedals to apply enough force to break the cassette lockring free.
A tiny tool that could save you a big headache while touring or on a long ride.
This product is only suitable for steel frames with integral steel derailleur hangers (it will break alloy frames or replaceable hangers).