Today I was working on our tandem, we haven't ridden it yet this year as we have been touring on singles. And as I was lubing the chain I noticed that when in the middle chainring the chain was acting "funny" at a certain point in the rotation. Not every rotation but more like every other. I did not find any tight links on the chain so I am wondering if the chainring might be in need of replacement.
Thoughts?
Thanks!