TUFO valve extension adds 31mm to any presta valve. Unlike a normal extension that slides over the valve, these extensions are placed between the valve stem and the valve core. Simply take the valve core out of the valve stem, thread the extension into it, and then thread the valve core into the extension. There is even a rubber seal on the extension so no air can leak.
Works perfectly on handcycle or racing wheelchair carbon fiber wheels with presta valves. Tufo valve extenders cost a few dollars more than normal valve caps, but they're absolutely worth it! The valve core can be removed by carefully using a pair of needle nose pliers, but it's easiest and safest to use the Tufo valve tool.
Sold individually (1).
Most items ship within 2-3 business days