I've just bought an early 80s steel framed bike with unindexed stem mounted shifters. As I plan to use the bike for commuting, I'd like to change the rear mech to use trigger shifters.
I'm not so bothered about converting the front mech at the moment, although I assume it's a similar (if not easier?) process.
The rear dérailleur is a Shimano Tourney (couldn't see a date - it's not new though) and there are 5x2 gears. The gear spacing is definitely less than 10mm although I've only tried to measure it with a ruler.
I've read lots of guides about doing this conversion, but I'm a little confused about what I actually need to do in my case.
I think the rear dérailleur is fine and doesn't need replacing. And I think that all I need is some trigger shifters, but I'm worried about the indexing and spacing. I've read that faster triggers are less likely to suit the spacing, but I don't know why?
Am I on the right lines? Thanks!