Our 40mm effective length threaded valve extensions include presta valves with removable core and allow deep section rims to be converted to tubeless use by way of external threads that secure a presta nut. 

• CNC machined aluminium valve extension, 2 grams each
• Rubber o-ring seals inside the valve to eliminate leaks
• Adds 40mm of length to any removable core presta valve
• Can be used with any removable core presta tube
• Sold as a pair
• Removable valve cores not included