Fixing a flat bicycle tire is a skill every cyclist should know. This video tutorial shows how to fix a flat tire on a mountain or road bike using a patch. The best way to avoid a flat is to keep your tires properly inflated between 40-60 psi. However, in the event of an accident, it's important to pack along a patch kit, tire levers, and a pump. To access the damaged tube, release the brakes and remove the actual tire. Apply the patch and replace the inner tube for continued riding.