Zipp - Disc Valve Adapter
zipp
Price: $49.99

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