How do i know which spare link jobby to buy...I am not sure what type of chain I have. I have a daws galaxy with 29 speeds... I would hazard a guess at a shimano chain but I have no idea what it is to be honest. I want to go online and buy a couple of spare links...the type I can mend a snapped chain with to get me out of a fix. Also I heard that in an emergency there is a way of by passing the de raillier (sp?) and limping home on just one speed...how is that done?