

A couple meters, you say? Sounds like a great way to trash your transmission.
It drives (pun intended) me nuts, but they don’t listen to reason. And the worst of all, is that they got their license in a hilly town and say they weren’t taught that. While I learned in a flatter place and was taught this.

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.