Been away the last 5 days, but I did take the next step last week and did an 80km ride entirely on roads with cars. Mostly the roads had a good shoulder but there are a few tricky bits. Navigating the V20 has become much better now and I can pretty much put it where I want within a foot now. Unplanned veering due to pedal input is much less for most riding. But this ride did include a 100m section at >15%. That was a challenge!! I did make it up, but I used the whole road to do it and was not sure I was going to make it. I also spun the front a wheel a bit. I think this bike would be good for up to 5%. I could use it OK 5-10% but would prefer my DF. Above 10% I think I would only do on this bike if it was a small part of a long ride.
As for the pace.... well, the bike is quick. It was a windy day, which would effect things, but for the total ride, I was a little slower than my fastest on my DF. But the ride consists of a hilly 10km at the beginning and end (I live in a hilly area) with about 60km of flat or gentle rolling hills between. I was faster than my fastest DF ride on the fast section... but I lost that and more on the hilly sections. But I was much fitter when I did fastest on my DF... so like for like, the V20 would be quicker.
So 35kph for the full loop (80km with 650m elevation), but the middle flat 60km at around 39kph (24mph). Bike is still standard V20 with kinlin shallow wheels, bottle under seat etc.
https://www.strava.com/activities/5123591247
How much faster would some decent wheels and a tail box and basic easy aero optimsation be?