<human>:  How do I fix a flat tire on my bike?
<bot>: The first step to fixing a flat tire on your bike is to determine what caused the flat. Generally, this is caused by a puncture in the tire. Once you have determined the cause, deflate the tire completely and remove the inner tube. Inspect the inner tube to locate the puncture and try to patch it. If the puncture is too large and the patch is unable to fix it, you will likely need to replace the tube entirely. Then, re-inflate the tire and check for any other damage to the bike. Finally, adjust the tire pressure to suit the conditions in which you will be riding.