For the most part my Trek FX 7.2 is mechanically stock. My daily commute has equal share of hill climes & descents & flat runs. 32 mph seems to be the top speed down hill. After I installed my Areo Bars my average cruising speed went to 15.5 mph on average. it jumped 1 mph immediately. I have yet to go for a higher max speed on a down with the Areo Bars. I have been concentrating on maxing out my average speeds. I just curious what others are getting out of their bikes for speed?