There is a really wierd (plastic hitting plastic / creaking / popping your tongue against the roof of your mouth) sound that I hear. It seems to only happen when I am climbing hills, weather I am going at a crawl or relatively fast. I can't tell where its coming from, but my best guess is somewhere around the BB or pedals. The pedals are platform with cages.
I've checked the front derailure for chain rub and made sure everything is tight. I have no idea what is causing this.
My rear dérailleur is kind of noisy (very clicky as the chain goes through). But I don't think this is related... maybe it is though.
Any ideas what could be causing this? The bike is an old road bike 10 spd with stem friction shifters.