There are basically 3 types of tyres for Mini-Z:
1. Pure rubber tyres - such as Kyosho, PN
2. Silicone tyres (with silicone oil) - such as PN and ATM
3. Foam tyres - such as X-Power and GQ
CT allows all types of tyres
MMS does not allow Foam Tyres
RCPHK does not allow Silicone Tyres
Silicone tyres (or rubber tyres with Silicone Oil) will make the RCP Track surface slippery but it will not damage the track. This is a fact.
Foam tyres will suck up the silicone oil on the carpet and reduce it's fiction. This is a fact.
Foam tyres will damage carpet track. This is a myth.
There is no good or bad track. There is only preferred track. I recommend all racers, especially the new racers, to try every track. Then play with the one you prefer.