Interesting, for a long time I have not visited this forum and recently started to get emails because of this followed thread from 2016
Well, I'm still happily riding my KS16 (some 9000 km) and I'm intentionally holding my desire for bigger and faster wheel. Reasons:
1. I prefer to ride with minimum protection gear - gloves and helmet (sometimes only gloves) and I'm aware that speed over 20 km/h is tricky to step out/overrun which inevitably means fall down.
2. My wheel is 17 kg and I comfortably care it up stairs, which would not be the case with 24 kg wheel (the current KS 16 inches per example).
3. I do not need rides more than 10-15 km and then for this range speed up to 30 km/h is enough for me. Time saving is not significant for such ranges.
4. Most of the time wherever I go, I'm still the only one EUC rider, so what is the point to ride faster when there is no competition (or envy).
5. Last but not least, doing my other adrenaline hobby motor paragliding when flying close to the ground and after some incidents I realized that 30 km/h is kind of the body limit not to get devastated by touching the ground.
Ride safe and enjoy the ride