Tire expert Roger Marble of http://RVtireSafety.com explains why a tire’s valves are so important. Bad valves can not just cause leaks, but can actually lead to tire failure and its dangers. Learn more about tires as they apply to RVs by visiting Roger’s website. This video is from RVtravel.com. Sign up for one of our many free online newsletters at http://rvtravel.com .