You are reading a single comment by @Belagerent 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.
Belagerent
There’s an over pressure valve under the hood on some Shimano road shifters, and it can open if the pistons are separated too forcefully or the system is bled very aggressively. Was the oil on the top or on the sides/bottom of the hood?