a combination lock and pump for use with a bicycle . the combination lock and pump has a flexible cable including an inflation tube running parallel with a metal rope or chain . the flexible cable has a male end preferably including a lock bolt or shackle and a piston - cylinder pump . the flexible cable also has a female end preferably including a lock cylinder with a key hole and one or more apertures to receive either a bicycle tire &# 39 ; s valve stern or the male end &# 39 ; s lock bolt or shackle . when used as a lock , the combination secures the bicycle from theft by looping the flexible cable around the bicycle and locking together its male and female ends . when used as a pump , the combination &# 39 ; s female end attaches to the bicycle tire &# 39 ; s valve stem and inflates the tire by actuating the pump of the male end .