Adequate, but not good for the long term
- Familiarity: I've put it through the wringer
I've used these and many other thread on extensions over the years. They all have one fatal flaw. The extension eventually cracks where it threads into the presta tube. The problem is the wall thickness is designed to be as small and light as possible. The thin wall eventually cracks from stress even though I never applied more than finger pressure to check tightness. From here on I will either buy tubes with a 80mm stem or buy valve extensions for use with removable valve cores.