Originally Posted by Hermes
I top mine off prior to every ride. The primary reason is to reduce the chance of pinch flats. Riding at lower pressure is okay, improves the ride and traction especially on wet roads. However, if you hit a bump e.g. a raised section of road, you will pinch flat. Pinch flats are a function of tire pressure, rider weight and the speed at which you hit the bump.
1. Do tires with lower pressures (80 vs. 120) ride slower?
2. When I ride with knobbies at lower pressures they tend to feel sketchy. Just sayin'.
3. "Large diameter tires have less rolling resistecne than narrower tires". True or false? Explain your answer.