Derailleur moves past the b screw limit?
I think it’s what causing my jockey wheels to be unable to clear the cassette… stopping me from shifting to seventh gear as its grinding against the side of the seventh cog
All my other derailleurs stop as the b screw stops
Any ideas as to what is going on ?
Thank you 🙏
by Far-Flower-2913
1 Comment
You sort of have a basic misunderstanding of what the b tension (b gap) screw does. It is not a limit screw. It adds tension to the spring in the b knuckle. SunTour’s b-knuckle angle alignment screw worked as a limit screw since there was no spring tension in the b knuckle.
If you have set up the b-tension screw properly ( or even driven it all the way in) and you still get rub on the large cog then there are two most common issues. 1) your gear cluster is beyond the capacity for your derailleur (check the manual) 2) your chain is too long (check your manual).
There are other possible issues, but these are the most common.