If you need to make a repair in the field, this is your solution! The "winged spacer" design makes installation as easy as twisting a wingnut. Our Emergency Valves offer a tool-free installation from the outside of the wheel, in about 1 minute. These are .453 size, and will fit everything from bicycles to truck tires. NO TOOLS required! Installs from the outside of the wheel Installs in about 1 minute Fits standard .453 wheel openings 20X stronger than standard valves Available in 2-Packs Black, Red and Orange spacers available Quality 360 brass components Patented and Made in the USA Colby Valves are not compatible with Indian Motorcycle stock wheels