FAAAASSSTT!!!!! The Nano 40c is built for speed, and let's just politely say it delivers. A 40mm, rounded profile and an elevated centerline provide enough volume for lower tire pressures and a smoother ride while still reducing drag and rolling resistance. This makes for an all out gravel destroyer that can still appease those clamoring for a truly big cyclocross tire. Winner We think so. So does superhuman, beyond endurance athlete, Jay Petervary. Rounded profile and elevated centerline provide enough volume for lower tire pressures Fast rolling and long lasting with good climbing/braking ability, great longevity and quick handling Incredible gravel destroyer that can still appease those clamoring for a truly big cyclocross tire