You are reading a single comment by @mespilus 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.
mespilus
Glass fibre reinforcement can be regularly seen in tunnel soft eyes in retaining walls where a TBM will be breaking through.