I have a couple of tires that I buy so often that I don't like taking to the tire shop due to lack of time. This allows me to make them all at home. I only used about 80psi for 13-15 inch tires. The filler hole sucks and leaks. also installed upside down. The nozzle cannot set the clock correctly. I disassembled both and missed the connections with teflon. Worked quite well but don't forget to wear earplugs.