That's still not the answer Aege, wanted. But good information.If he hasn’t actually used ,it just trying to save wasting money. They even had a plate you could bolt on to stand on, to add weight and grip of tyre to the ground.But to stand on it with two feet and wind handle and steer is impossible.
PC forum October 2006 the same answers were given, exactly the same not to waste money.
Whilst the comments both Birdman and I did not address the specific question from the OP, the circumstances and nature of the question raised a concern where the OP was new to the subject and may not have wide experience, especially concerning the safety of such devices.Prof and Birdman 101, your replies are not to what Aege was asking. It's about tyre size.
No wonder people get fed up with this forum.