Hey all,
I have a 1997 Marin Pine Mountain. The middle (front) chain ring has a broken tooth. I believe it is a 32 tooth Deore. I have found a couple on eBay. Which one do I need? Is there any difference? I found a M490 and a M590. Or are these not compatible at all? I would prefer to do just the center ring so I don't have to replace the BB. Any help?