The rear wheels are 72mm inline skate wheels that I got from my nephew's skates which he outgrew (I slipped him $5 for it). The front are 100mm in diameter

Are the two different diameter wheels by design or chance? Would 4 x 72mm wheels or 4 x 100mm wheels work just as well? Looking at the photo, there seems to be some kind of inherent design logic to the wheel slant.


thanks