Does the term "plumb" not actually refer to aligning stuff straight?
The plumb in plumb-line refers to the lead weight (plumb-bob) at the end.
@gbj_tester 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 plumb in plumb-line refers to the lead weight (plumb-bob) at the end.