Muc-Off Big Bore Lite Valve Stem. Features: Big Bore Valves provide ease of fill and maintenance by eliminating the inner valve core Flow is controlled by an internal ball valve controlled by an intergrated external lever Ball valve allows for 245% more flow than a standard valve with inner core 4mm machined hex key slot on bottom allows for easy installation and removal Lite model comes with a Presta style valve sized head 60mm model has suggested rim depth of less than 20mm, 65mm model has suggested rim depth of 20-25mm, and 75mm has a suggested rim depth of 25-30mm Third party online retailers must be pre-approved by manufacturer Specs: Model:Big Bore Lite Length:75mm Color:red Valve:Presta Insert Compatible:yes Package:pair