Originally Posted by
gregf83
Your chain looks way too long and there doesn't seem to be enough tension.
The rear derailleur also appears to be a long cage version where you could get by with a short cage. To prevent chain drop you could add a narrow-wide chain ring which should help.
Yes, the chain was at full length in this photo. I waited to remove links as I felt things out. The rear derailleur is an old SunTour XC Pro medium cage.
I'll look into the narrow-wide chain ring; I'm unfamiliar with that.