Zipp disc valve adapter

Synthetic elastomer gasket with 2X the holding power and 5X wear resistance of traditional gasket materials Two stage seal design, improves sealing and stability on all presta valve stems Adjustable compression, user can tighten the cap to increase holding power by 4X and compensate for wear 15 degree stem angle reduces stress on the valve stem from pump hose SRAM Model ID: WH-SPP-A0