what kind of tires sohuld i use on grass/ pavenent because the ones i got now just spin like crazy in the grass.

Unfortunately there arent any tyres I have found that work good on both.

what sort of vehicle? I presume it's for your savage?

no.... its for my rc10gt

well, i mostly drive on grass

You know, the absolute best tires i have found for grass or really loose dirt are the Proline Sand Paws... They hook up very nicely and dont wear out too fast.