If it isnt built for Di2 defo mechanical Di2. If you are a neat freak you would hate external Di2.
@amey started
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.
If it isnt built for Di2 defo mechanical Di2.
If you are a neat freak you would hate external Di2.