Review on 🔧 Slip Chuck by LEZYNE by Justin Live

Lezyne pumps are excellent - the sliding cartridge idea. not as much. If the hose isn't routed perfectly, with no kinks, kinks, or pressure on the valve head, the cartridge will pop out after a few squeezes, or if there's enough pressure to simply hiss air. The cartridge relies heavily on rubber O-rings to create a proper seal around the valve stem without mechanical assistance - unlike a traditional thumb-lock pump. They will end up using the standard flip chuck that comes with their pumps out of frustration.