Aaaaaaaaron,
the 2wd front tires here are narrow tires (schumacher stagger rib), they have to be fitted on slim rims, but asso doens't have this so you just glue them on the outside of a wide rim and then you can cut off the inner ring. The ring isn't removed just because he didn't have the time
the 4wd, sometimes the front end has waaaaay to much grip, you could cut alot of pins from the normal mini pin front tire
OR mount 2wd mini pin on the front
OR mount 2wd stagger rib (like here) on the front, each tire gives a different handling.
more questions? shoot!
Coop, (and freud )