Metal valve stems are a tire option.
Differences:
- Metal more difficult to install
- Metal more durable
- Metal stems are smaller
- Metal wear out faster
- Metal corrodes
- Rubber tears at base
- Metal more brittle
- Rubber easier to replace
- Metal are shorter
- Metal cost more
Video clip of pros and cons of each type:
It costs about $2 per metal valve stem plus about $10 for installation.
How valve stems work: https://www.discounttire.com/learn/valve-stems
