Originally Posted by
FrozenK
Some early 90s steel mountain bikes had horizontal dropouts. I had a 1991 or so Specialized Stumpjumper for a while that I converted to single speed for commuting. I don't know if you'll find any for $50.
Another option is to just buy any cheap frame and use a chain tensioner like the Surly Singleator. Or try to find a magic gear rate for the frame.
good call. Lots of those specialized frames for sale right now in Spokane. Just not sure if they had horizontal dropouts or not.