53-19 is my common flatland gear. Allows me to spin up from 80 to 95 rpm pretty easily. Cruise at 75-85 spin up to 95 on a straight or slight rise. I'm currently at 150 watts steady state max so the gear allows me to push above upper limit..say on a 3 minutes interval where I push hard as I can on hoods and roll (solo) 21-22...occasionally a bit higher but i can't spin (easily) much faster than 105. Any faster speed takes the drops. My long term goal is to get to 200 watts steady state output and that likely means 18 or 17 on the rear unless I roll at 90 rpm all the time (possible). I now have real appreciation for the TT and Tri riders.