Maillard helicomatic cog width
Hello, I'm new on this forum and i like working on old road bikes.
A few months ago I was working on an old Batavus Course from the 80's with a rare 6-speed helicomatic freewheel cassette which I never seen in my life before. The bike was in terrible shape and the chain was ofcourse also worn out so I replaced it with a cheap KMC 8-speed one. After I replaced the chain, the chain would, while shifting, sometimes not fall into the cog properly and then slip over it. When it once was settled, it rode perfect with no slipping at all.
What I noticed on this cassette is that the cogs are really fat in width (2mm) while other 6-speed cassettes I measured where more like 1,7mm. Also the spacing seems less.
Do I need a special chain for this cassette? I noticed that the most new 8-speed chains have wider side plates. In another thread on this forum someone suggested a SRAM 830 or an Sedisport chain.
I will attach a picture so you can see what I mean. Thanks in advance.
P.s. it seems I can't upload pictures as a new user so here is a link imgurdotcom/a/m7wm9O8
Last edited by ffk27; 03-28-24 at 03:05 AM.
Reason: Added picture