This is my first mod and i dont know if anyone has ever done this before but here it is...
I have got a blue zz motor in my bit (seems faster than stock)
I have green zz gears (also seems faster than stock)
I put em in cause they were free...
Any how i noticed that i could take the zz wheels off the axle
and once i got the wheels off i started digging through all my old slot car wheels and tires.
I found a pretty wide set of wheels and to my suprise they fit on the zz axle perfectly.
so i put the tires on and now the wheels are way wider than stock ones and stick out of the fender. I dont know if this helps handling or traction but it looks awesome!
I had to add a spacer (washer, nut, etc.) between the wheel the chassis on one side to make the wheels stick out equally on both sides of the car.