Curious. I've used a step-down ferrule for the RD, but never seen one needed on a top tube.
Having said that, I've just checked mine and they're obviously intended for brake cables, which shows what I know.
I've got three: PM me if you want to try them out.
@Scilly.Suffolk 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.
Curious. I've used a step-down ferrule for the RD, but never seen one needed on a top tube.
Having said that, I've just checked mine and they're obviously intended for brake cables, which shows what I know.
I've got three: PM me if you want to try them out.