Cycle Repairing and Adjusting
With a Chapter on building a Bicycle from a Set of Parts

24 CYCLE REPAIRING chain wheel made for a 1-in. block chain, for which a 1-in. pitch twin-roller chain will have to be used. Shortening a Chain.—To shorten a cycle chain the following instructions given by Cycling may be followed : It is easier for the amateur to detach two links than one. To determine whether two can be taken out, slide the back wheel right into the slots by unscrewing the draw bolts, and then see if the chain can be connected on the sprocket with two links to spare. If so, it is better to have them detached. File the rivet head flush with the side Fig. 14.—Parts of Hans Renold Chain plate, prise the latter clear of the rivet, and twist it round until there is room for the link to slide off the chain. Be careful not to take it off at the end of the chain where the bolt fits, and also examine the bolt to see if it fits well. If not, it will be advisable to have it renewed. In good chains the pin is made of very hard material, and care must be taken when using the file, for it is easy to damage the plate instead of filing the pin. Look carefully at all rivets in the chain to see if any have become loose from the side-plates. This will sometimes happen even with the best of chains, especially after hard riding or when they are getting old and worn. To rivet them up, hold the chain sidewise on a piece of heavy iron (a 14-lb. weight