Yeah, I don’t doubt it, I was just trying to be (overly) conservative to show how pedaling up to and keeping 50kph is far from being reachable by the average cyclist.
Not only because of the bike, but you also need a well maintained strech of asphalt to reach and maintain that speed.
In my head I thought I can easily get to 60kph with the sprint output I do with my gravel bike if I had a carbon road bike, but I didn’t want to say something silly. Especially because I’d still be dealig with the same terrible infrastructure and wind around here.
The other point was that once you get in the 40kphs it starts to get scary, but that’s down to where you are and the conditions. So it’s not like the average bro with flipflops and front basket does it on the daily.
Do you have a computer telling you that speed or are you just making a guess? Because I find it unrealistic to be +30 kph on flat ground with a mountain bike for 30 minutes.
I say this because I have a gravel bike and can only keep +30kph for long periods if I’m on a slight incline and I’m pedaling with a purpose (not full sprint, but you wouldn’t see a commuter pedal that hard)
On average people in commuting bikes will most likely be at around 15kph, low 20s on descents.