I suggest you get a c-to-c measurement of the bosses/studs pronto. I've just been down this route on a late 80's/early 90's design tandem.Thanks - didn't know that. It's a 90s frame, not sure on the exact date, but it had biopace on it so I reckon 92-ish?
Will do - got my 8 speed bar ends today. Thought they only had 6 clicks at first but they'd just been put back together out of alignment after they'd been removed from whichever bike they were on - I'm getting thereCheck that stud width before you part with beer tokens.