Daaf, so you saying you're better off with a heavier buggy?
And unless your only about 12 and your Apexx is a special kiddy one, I can't see how your bug will be only 44/46kg with these. The maths is 2x 8.2kg (beach racers) 1x 5.5kg (duro for front?) and 34kg buggy = Approx 56kg. Have you actually weighed your Apexx?
edit: just checked weight on xxtreme website and it quotes only 23kg for standard apexx, but I'm sure Ruudje said approx 34kg to me the other night??