Hmm, had one of them myself - think it was more like 3-4 tonnes. Rode mine into a Volvo once, and it caused more damage to the car than the bikeSimon said:I believe he may be refering to the 80's pushbike 'Releigh Grifter', one of which I used to own. It had a 3 speed 'grip shift' which include a neutral and weighed about 3/4 of a tonne.
If you want more information then look here http://www.bixby.co.uk/grifter1.htm![]()