If you pump them up to 42 psi you can ride on them forever but won't get them to heat up enough to get any traction, which would be like riding on Shinkos. If you only have 30 psi in them they heat up get great traction but only last 2,000 miles. I think I'm starting to understand some of these motorcycle rules. One could choose to ride at 42 psi but you just can't ride with your buddies because the tires won't grip and will put you on your ass but you will save money on tires. Only running 30 psi means you throw money away on tires but don't end up on your ass. Seems simple enough, maybe I won't need that riding lesson on how to make my tires last longer, I get to choose how to ride and what tires fit how I ride.