Your Bike Tires May Be Able To Pump Themselves As You Ride
PumpTire uses the rhythmic compression of the rotating wheel to maintain pressure
Despite the impressive array of innovative bikes we’ve covered recently, many economically minded people are cruising around on 20-year-old bikes that suit them just fine. If your bike is that old and has its original tires, chances are that one or both of them continually lose small amounts of air. This process is known as diffusion.
The current design of PumpTire replaces a similar one from a few years back that had issues with durability and protection from the harsh conditions faced by the outer tire. Once the tire wore away to a certain extent, the pumping mechanism would stop working. However, now the tube incorporates an anti-puncture layer that offers additional protection against common hazards like nails, glass and thorns.
When it does hit the market, the PumpTire is expected to retail for $30 to $55 for a kit, which will fit third-party 700c and 26-inch bicycle tires. It weighs about 100-150 grams more than a standard inner tube, but that’s a small price to pay for many.