Don't use up all your hard earned dollars to pay for overly expensive bike tubes, Defiance Bicycle Tubes are a great way to keep your bike functional and rolling properly without emptying your pocketbook. Buy some extras to keep around the house, put one in a handy saddle bag in case of emergency, the more you buy the more you save and if you are a serious biker you can't have too many tubes. The Defiance tubes are durable and long lasting with a reinforced base and constructed of quality materials. Defiance Tubes come in many popular sizes with valve types to suit rider preference.