I had to go to my LBS and have them find replacements for my large and small chain rings. Ebay is a source, but I could never find exactly what I needed. I have a hybrid so it was MTB based chain rings. We ended up with two different manufacturers in the end for the two chain rings. For some reason chain ring replacement is a mystery for many. Even the LBS folks took a half hour to figure it all out. I took both chain rings into the LBS so they could see them also.