I mentioned this in my rebuild thread, but I figured it would get more responses on its own.
I'm in the process of rebuilding a mountain bike that it does not look like I will be able to use a front derailleur on (frame damage), so I'm considering running a single ring up front and a cassette and derailleur out back.
Since I just purchased an LX crank and BB, I'd rather not buy a new single ring crank, so I'm looking for something to keep my chain on the middle ring and keep it from dropping onto the granny. Due to the frame design (pic) I don't think I can use a tensioner that mounts on the chainstay, and all the other tensioners I've found assume a single speed rear gear.
Has anyone else tried doing this, and if so, what was your solution? Is it as simple as mounting a 3rd eye chain watcher sort of thing, or do I need something else? Thanks.