You will have 13.6% more speed and 13.6% LESS torque from the stock 14/50 setting.
So expect a higher top speed on level ground and going downhill. But expect to LOSE top speed when going up any kind of incline.
With my 14/47 I can hit 74mph easy on a slight slope, 65ish on the flat and 60 on a slight hill. I may bump up one tooth to a 14/48 or 49 next chain change.
Have some fun with this site.....