Originally Posted by
breezwhey
I have a Redclover custom small front chainring on a different bike, so maybe that chainring is shaped already to work just fine. I guess I'll try that chainring first if I have issues. This looks like a good alternative if it doesn't fix it. If I use that chainring I will have a rather large difference 37-52. I'm currently running a 37-50 on a Stronglight 104, but with the stock Sedis chain, so hopefully this won't be too wide a difference, although that has to be pushing it.
The bigger tooth difference should work in your favor.
But, if the chain decides to start falling inboard of the smallest chainring, you can just reverse the file and cut from the driveside of the teeth as shown below:
