Finally, a FAST screw on deflator that stays in place! These innovative deflation valves make it quick and simple to air down without the need to dismount your tyres. Simply remove your existing valve stem core and screw the iThrottle Quick Deflate Valves onto your existing valve stem and you’re ready to go! Install takes 5 minutes or less for all four tyres. Includes a ‘Time to Deflate’ decal and a valve core removal tool for easy installation.