I'm also baffled as to why the OP isn't just going for a JTEK bar end alfine shifter? It's a far tidier option than either a twist grip on the bar end or an extra section of bar to mount a shifter on.
@Black_Rainbow_Project 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.
I'm also baffled as to why the OP isn't just going for a JTEK bar end alfine shifter? It's a far tidier option than either a twist grip on the bar end or an extra section of bar to mount a shifter on.