The restrictions are due to heat build-up. Extended high-speed running will literaly melt the inserts.Originally posted by fatty_k
All kinds of "restrictions" though like: maximum distance on hard surface at high speed is 20 miles, and they can only handle a top speed of 80mph. Im guessing that with speeds over 80mph the centrifigual force may be too great and the foam may start to break apart:think
Exactly. The tire heats up from flexing. Take a coat hanger and bend it back and forth rapidly until it breaks, then touch the broken end with your finger. After you pull your burned finger out of your mouth, think about where that heat came from.:thinkOriginally posted by KID KDX
Next time you are on a ride and take a little break, take off your glove and feel the tire!:scream: