I bike commute 8.5m ea way daily [have done so >10 yrs] and I remember being sorely disappointed when my speed on my full suspension mtbike on 2.2 tires vs my hybrid road bike didnt approach what say elite road bikers can do. Other than hand position, my sirrus is literally a road bike. It's tuned up, perfect, almost frictionless, 700x28 commuter tires.
as an example: mixed urban mtbike commuting [occasional curb hoppage, train tracks, etc] strava smartphone app has me at around 15.5 mph [counting moving time only]. Best ever is say 16.0 mph
Then on my hybrid road bike [complete w/clipless pedals] I was thinking to myself... sweet. I'm going to completely nail it. Yea, look out world. Results? Averaging 16.0 mph, never quite hit 17.0 on my trip. For reference typical flat-ground 'speed' is 18-19 mph, it all averages out [starts, slowing for a light, etc], this is just strava data which counts when you're moving only
What am I trying to say? I dont know. I only do about 2.5k miles/year though, I'm just not an elite roadbiker lol. Somebody that is will be able to do 20 mph avg for 15 miles. That's just not me :)
:cry:
I also have an electric bike [found an A2B metro on craigslist], I modified the speed control circuit and stock it was speed limited to 20 but with a mild tweak and some extra batteries it can average 30 on my commute [peaks around 35]