Schumacher don't do minipins in Stadium Truck sizes, they used to do a blue microspike but out of production as far as i know and were very aggressive on carpet.
Schuey yellow minispikes, Losi Silver step pins or Ansmann Macnum kit tyres work on back and Schuey yellow stagger ribs on front unless you have excessive understeer with them... proline Dirt Hawgs are quite good on the front on carpet but very soft and grippy.
Hope this helps
