The freezing might work. If you think that freezing them (which makes them harder) would make them more tough, try it.
Wheels dont make a skateboard easier to turn on the skateboard trucks do that.
no
yes the sizes of skateboard wheels range from 40-70 mm
Bones wheels
yes
polyurathayne,
4
Wheels
Shark Wheels are a type of skateboard wheel that have a unique shape resembling a cube with grooves. They differ from traditional skateboard wheels in that their design claims to provide better grip, speed, and maneuverability due to their shape and pattern.
The wheels allow them to move. If you look at a skateboard it has wheels.
Skateboard companies make decks and wheels
There are no trunks on a skateboard, you are probably referring to the "trucks" which are the parts the wheels attatch to.