Got mine today and top speed was 25km/h now 35km/h and I way 93kg and top speed on the road 36km/h start it hold the brake klick 5 times and then the red S symbol appears and then its done
I think this is the Max version. Which has a higher Wattage motor. However.... If you want to swap the front tires around I think they work, but you've got to shell out like $100.
@MrCreedmc The website states 25mph in the UK. I squeezed the left break and rapid pressed the power button until I heard a beep and then it could go 25mph on S mode...