I am having a problem with the chain tension on my SS. I have a 17" steel Specialized Stumpjummper. I am running a 32t ring and a 18t cog. I am able to do this without a tensioner. The problem is the tension is greater at certain points in the cranks revolution. It looks like the chain is actually going up also. Is the chainring squashed? I cant tell by looking at it. Any ideas would be great. It isn't really causing a problem besides probably wearing the ring out faster.
Also I am using an older 9 speed chain(about 300 miles). I held the chain up tp another 9 speed with more miles(road) and the one I have on the singlespeed is about a 1/4'" longer at the same link. Can a chain stretch that much? I tried the chain off the road bike and it was so tight the wheel wouldn't go all the way into its groove. I was hoping to be able to go without a tensioner. Would it be a better idea to just put a tensioner on and buy a new chain and add 2 links?