My PR time into work from door to door according to my cell phone is 80 mins for a 20.6 mile commute. That's 15.45 mph. That's on a fg w/79.1 GI. 500 ft drop on the way in to work. My PR on the way home is 85 mins for a 14.54 avg. Again on my fg w/a 500 ft climb.

My conditioning is improving after being off the bike dealing w/severe health issues for about 1.5 years. I'll take those numbers, anytime. My short term goal(s) are 75 min in and 80 mins home. That would be 16.48 and 15.45, respectively. Alot depends on how I'm hitting the lights going through town, but I absorb that variable in my overall time as I don't have an on board computer.

The top end for this gear combo(48x16t) is 21.2 @ 90 rpm. There are just 3 hills where I 'pedal out' on the downslope(s). After reaching my goals for this gear combo I'm going to go to a 14t cog as the top end will increase to 24.4 mph @ 90 rpm. By that time I should be fit enough to pull the climbs...in hopes my knees hold out. Otherwise, it's the 'walk of shame'.