I'd say it's for show-likeness, because in the G1 cartoon Optimus Prime's wheels just disappear.
http://tfwiki.net/mediawiki/images2/...shermandam.jpg
I'd say it's for show-likeness, because in the G1 cartoon Optimus Prime's wheels just disappear.
http://tfwiki.net/mediawiki/images2/...shermandam.jpg