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
• 12.0g