Inflating tires on disc wheels presents its own challenges, but with Silca's Side Lever Locking Disc Chuck, it's easy as pie. The low profile head fits into tight confines and the side lever locks the chuck onto the valve stem so it won't blow off even at high pressures. It uses Silca's 254 gasket that's preload is adjustable so it fits perfectly on any valve and you can dial it in even as it wears. It's all carbon steel construction is super durable and built to exacting standards and Silca guarantees it for 25 years. If nothing else, it'll help remove a little bit of frustration that isn't warranted, especially on race day.