Will check...this could also have some other reasons:) But if, they will miss the following: http://worldwide.espacenet.com/publicationDetails/biblio?DB=EPODOC&II=4&ND=3&adjacent=true&locale=en_EP&FT=D&date=20081113&CC=WO&NR=2008135487A1&KC=A1 and there are some more... This would explain why the were going for tires in the first place.