User blog comment:Madlooney6/Models Tournament: Heat H/@comment-9751413-20141001174324/@comment-5687742-20141006113515

I used to build K'NEX Robots myself and unless Volcano has changed slightly since that photo was taken, it doesn't even have any tyres, just two large cogs (which I know for a fact do not work on solid flat surfaces as locomotion cos I have had the same problem with LEGO cogs) and a pair of small wheels that don't require tyres (also not best suited to solid flat surfaces, I know from experience).