Semi-slick gravel race tire is designed for Zipp’s unique 303 XPLR SW and S wheelsets Lightweight casing provides a supple ride quality M:Wall protection helps prevent cuts and reduces the chance of getting pinch flats Tread pattern designed for fast racing on smooth gravel, best in dry conditions Tubeless Complete, and Dual Angle Beads ensure safe retention on XPLR rims Designed for use only with Zipp 303 XPLR wheels - 622×32 TSS rims