You are reading a single comment by @Manson7am 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.
@Manson7am
mostly to do with the tubing of the frame and the quality of the components. The 6KUs are "Gaspipe" tubing and weigh quite a bit.
The second hand ones can be lighter weight steel (reynolds etc) or aluminium or carbon.
EDIT: What they all said. /