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

TYRE TUBE REPAIRING 59 valve rubber. The remedy is a new valve rubber, but sometimes reversing the old one will answer. Valve leakage is occasionally found to be due to a piece of grit under the valve rubber, or the rubber not covering the small hole in the valve stem properly. Repeated Bursting of Tube.—Repeated bursting of a tube is probably due to careless replacement of the tyre ; or it may be that the tube is too big. Repair the burst, and inflate the tube until it assumes a circular shape. Place the valve stem through the hole in the rim, and tuck the tube all the way round into the bed of the rim. Then slip the cover on as far as it will go ; probably there will be an obstinate portion about 12 in. long. Opposite this part place the two thumbs in between the rim and the cover, and slide them in opposite directions. This will enable a little more of the cover to be slipped on. Repeat this until the cover slips into place. Before inflating, glance round the tyre, and see if the tube is nipped any- where. Tighten the valve nuts, and inflate the tyre until °nly a slight impression can be made by pressing with the fingers. Defective Valve of Single Tube Tyre—In the event of the valve spring of a single tube tyre having become Weak and failing to keep the pin up to its seating in the valve, unwind the brass wire which secures the metal part of the valve in the rubber neck. The metal part can then Pc pulled out and the valve taken to pieces. It will be found that the movable part has rested ; clean this by scraping, and replace. If the spring should be found to fic too weak or broken, replace it with a new one, or pull