As has been my experience with most of the ones I have sold from other companies. Rocky's Flow works better smaller than sized for XC riding. As do the Fujis also. The classic mistake I made when this type of bike first came out was to try and put people on the same size frame they used for XC riding. I am glad I always get folks to try several out to see how they fit and get their input on the ride. I learned a lot just from watching the better riders test spin them. And my own test runs helped imensely also.