Do any of you Campag users have a spare lock ring suitable for an 11 tooth bottom cog that I could purchase?
It took me a while to suss out why I couldn't get 11-25 speed Shimano cassette I've fitted to my Campag wheels (yes, I run a mix) to stop jumping in the 11 tooth cog. Turned out the chain was resting on the lock ring, rather than fully engaging with the sprocket. Speaking to Mr Junior, turns out there's 2 sorts of lock ring; One for 11 tooth & one for 12 and above. (Why?)
If there's no spare readily available, I'll have to try to get one mail order as nobody seems to stock them locally.