The screw can get corroded if left alone during winter.
I work with cars and it drives me insane when people don't refit valve caps, they serve a purpose so use them.
@dazzrie started
London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
This site is supported almost exclusively by donations. Please consider donating a small amount regularly.
The screw can get corroded if left alone during winter.