Serfas VERMIN Tire 26 X 1.9 Clincher Rigid Black Sunshine_Enriched Our proprietary design means a Sunshine_Enriched Our proprietary design means a slightly less ovalized ring (10%) with less aggressive timing (112°) than competitors’ versions The SHIMANO GRX RX 810 F front derailleur offer lighter front shifting operation and easier setup thanks to the new link construction and integrated cable tensioner this tire is built for unparalleled puncture resistance using Serfas’ Flat Protection system Its low profile tread pattern has minimal rolling resistance for ultra high speed cranking and shoulder lugs that bite into the corners