"Horsepower is old news. Big MPGs are what it's all about," reads the promotional blurb for the Pump Rebels 2012 Calendar.
Self Inflating Tire Could End Under-Inflation
The Self Inflating Tire is simpler than it sounds, consisting of just two components: a peristaltic pump and a valve that stops over-inflation. Basically, a round tube embedded in the tire's sidewall is compressed at the bottom as the tire rolls, forcing air into the tire. Once it's inflated to the proper pressure the…
