Well i have both tire kits now, the Bit Rcaer and the Bit char-g tire kits. It is a good idea to get both so you can switch it up to different tire combo's. The bit char-g colored tires are much softer than the bit racers and are nice for grip. The bit racer tire sets are pretty Hard even the softest tires in the set are harder than stockers. ZZ tires are pretty cool to!!! The tred pattern give them VERY GOOD grip. Unfurtunantly you can only put em on the back
unless you put ZZ rims up front. They're so grippy i was able to wheelie with them on, but couldn't with the stock tires/slicks.