Tires are one of the most important parts on a bike. That's why you'll always find us going above and beyond when it comes to our tires - because we can't stand riding on squishy, low-pressure tires. Roulez tires have a fast, low profile tread design and are rated to 65 psi. We specify a premium skinwall casing that makes the tires even lighter and faster. If we wanted to cut costs, we could order these tires with a heavier, lower quality casing, and nobody could tell the difference - but the tires would weigh 180 grams more (almost half a pound) and wouldn't roll as well.