When your bike gets a flate tyre it sucks ! If you ride your bicyle tire over somthing you will have to Repair a flate tire.  However bike tire repair does not have to be a pain, to fix a flate is really easy, ask us if you do not know how.  To change a bike tire you take it off with tire leavers or just put tire sealant in the tube or tire.  In some cases you can just use a tire patch kit and and be on you way again.