I'm using an ultegra di2 12spd with cn-m8100 12spd chain and it appears that the chain is "sticking" when in 10th gear/cog. Notice in the slowed-down video that the chain sometimes is not firmly flat and also going downwards ("sticking") to instead of parallel going back to the front cogs, hopefully that makes sense.
Don't have this issue on the other cogs, it's only happening to the 10th cog. Any ideas? Thanks heaps!
Chain seems to be sticking when in 10th cog (11-34T 12spd)
byu/Foreign-Driver inbikewrench
by Foreign-Driver
3 Comments
Have you tried lubricating the chain?
Are the chain and cassette replaced at the same time? They both look quite new, so I guess yes.
Is the width between the cogs same as for other gears? So assembled correctly?
Does it stop happening under load? For example if you hold the wheel back a little by hand?
If one of the answers is no, it’s a problem. But if all are yes, just lubricate and continue your bike rides.
Maybe it isn’t the cause but:
https://www.google.com/url?sa=t&source=web&rct=j&opi=89978449&url=https://www.youtube.com/watch%3Fv%3Dr8XTCtLEoEw&ved=2ahUKEwjKj8_D95KLAxVa9bsIHb6EEk0QFnoECBgQBQ&usg=AOvVaw329zXEQxREPCfvrDoYSa2J
Spacer (part 11) between 9th and 10th cog had been installed?
https://si.shimano.com/de/ev/CS-R8100-4861