I installed the 13 Ohlins on my 2016 SGS a month ago at 6200 miles. I have a 31 inseam, and both feet are flat on the ground with knees bent. I "think" that I can tell it is slightly higher when I'm sitting on it, but when I'm off it and look at it I cannot tell. Nobody has asked if my bike is higher, so they can't tell either. I would select the 13" if I were doing it again, no regrets. Just as Old Mike and 2017 SG said, big difference. No back/teeth jarring hits, and handles great. The bumps in the road that use to wake me up are hardly noticed now.