For when things get gnarly.Sacred Geometry hollow bead wall design improves lateral and vertical strength. Wider bead wall effectively reduces pinch flats and increases impact resistance.Moderately low 19mm profile height and wide width, balances the benefits of radial compliance with high lateral stiffness and predictable handlingRadial Compliance improves traction over bumps and chatter, while reducing negative feedback to the rider. Performance and comfort are improved.30.5mm inner width is extremely versatile, fitting tires from 2.0" to 2.6", and even allowing + size tire use without negative 'squaring off' of tire profiles.Bead Bite hookless design enhance tubeless performance and tire security, even at lower pressures.