You are reading a single comment by @recycled and its replies.
Click here to read the full conversation.
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.
@recycled
My understanding of it was 4130 was the generic name, 531 is how Reynolds manipulates the tubes. Happy to change the listing if incorrect though, no intention to mislead =)