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User33236
Guest
I rake a spare hanger with me when I do a bit or touring. Minimal weight to carry alongside everything elseNot a tool as such, but i was talking to a guy at one of the stops on RideLondon yesterday who's rear derailler was bent. He had a spare gear hanger in his pocket.
Probably oldest thing I carry is a fine metal pick. Handy for getting tiny stones etc out of tyres