Zipp G40 XPLR Puncture Resistant Tire - 700 x 40, Tubeless, Folding, Black/Tan, A2The Zipp G40 XPLR is a wide (40mm) tire designed for control, which in gravel translates into higher overall speed. In developing this tire, Zipp began with a chevron center tread pattern for speed which transitions to an inverted soccer cleat design and added XC style knobs on the edges for the ability to dig in when you need it. Durability was crucial. The tire's casing and bead to bead puncture protection strip navigates the fine line between