So I did a rough assembly of my 91 Stumpjumper yesterday and after I put the wheels, seat post and bars on I decided to do a fit test.
Previously I was riding heavily upgraded 2014 Specialized hardrock 29er that was a 17.5" frame and it fit me well. The Stumpjumper has a 18" seat tube and a 23" top tube. I have a 32" inseam and the the top of the tube on the Stumpjumper is 30". Is this about right because of the smaller tire size?