You are reading a single comment by @Jampster and its replies.
Click here to read the full conversation.
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.
@Jampster
I've just finished putting together my new geared bike (soon to be in current projects..) and discovered I've got a fair amount of chain rub against the outer ring when in the smallest sprocket.
My chainline should be correct, I'm using a Campag 102mm BB with Campag script era (1995 onwards) cranks which i believe is right.
Both chain rings are modern 9/10 speed TA rings which if anything should be slightly thinner than an 8 speed ring (I doubt there is any difference...) and they are 39/50 so the spacing between them is actually quite small.
The chain is a SRAM 8 speed, which is the same width as a Campag 8 Speed (7.1mm) so this shouldn't be an issue...
Finally, the chain rub is worse is on the top side of the chain, suggesting it isn't a case of having the lower limit setup correct, at least i think thats the correct assumption!
No idea whats up really, its not the most important gear ever.. but it is annoying. I suppose a 9 speed chain chain might solve the issue, but shouldn't really be necessary.
Any ideas?