You are reading a single comment by @Brommers 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.
Brommers
onyerbike
How can I get a sm btr2 battery to work with an older external di2 system? It works fine with btr1.
Is it a firmware issue or will it just not work? Ew67 junction, everything else recent ultegra level.