whats also i bit of a prob with them is if you go into ground thats already churned up by motors with big tyres(even 205's) they bog down easily but if runnin over fresh moorland they are great ,tried my hardest for 3 days to get it stuck,didnt manage cos they float aswell 8) ,xmob see the supacat u have what mk is it? is the ramps enclosed or open?