Thanks guys...im 21,
the wheels work with a 5-1 adapter and the centre nut you see behind the r-clip is actually the one that holds the wheel on, it comes with the BIGGEST wrench you have ever seen lol
TSW used to have a similar wheel called the Zenon, no not the venom..which worked with a dummy centre nut...these ones are the proper ones and 2 piece as well
i really dont want to take it out n get it all covered in flies and dust and dirt now...d'oh!!