I first saw this type of chuck while traveling in Vietnam a few years ago. Throughout Vietnam you find tire repair stations along the roadside, and I was continually amazed to see them use large tire irons to manually install truck and car tires, often having 2 or 3 people stand on the tire sidewall while another person used the lever to pull those last few inches of bead over the rim. Then I watched as they attached the locking Schrader chuck onto the valve, placed the entire wheel around the corner of the building, and inflated it from the other side of the wall! When I inquired about the chuck with the shop owner he told me 'Expensive, but worth it!' as it allowed his employees to inflate truck tires to very high pressures from a safe distance.
This version of the classic lever-lock chuck is produced in Taiwan from nickel plated brass and stainless steel. We looked at more than a dozen variations on this design from numerous suppliers before finding one that worked this well. We also worked hard to find a vendor with values in line with our own. While most SILCA parts are produced in house, this one is not. The supplier we selected is certified by both TUV and ISO for quality and safety, and just as importantly is RoHS compliant, meaning that they have eliminated all toxic and environmentally hazardous chemicals from the products and manufacturing processes they use. We believe strongly that protecting the environment as well as the health and safety of the employees producing these products is not simply a nice idea, but is our duty.
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