Review on 🔧 40mm Presta Tubeless Valve Stem - Pair for Enhanced SEO by Mike Cox

Couldn't get them to the valve seal on my rims (Alex CXD4s) with Donnelley/Clement USH tires. Tried o-rings inside and out. Literally spent hours and hours on these valves. Should have just paid the extra $7-8 for a Stan valve as I eventually gave up and switched to an old pair of Stan valves and got better results straight away (there were still some minor valve seal issues but I did not regluing it after using these stems, and I suspect this is partly due to these things blowing up the valve hole too much).