Nothing, really, aside from the fact that they are pretty wide. OTOH, they’re also not very tall, which is how Subaru is able to put the spare tire in the engine bay (at least they used to do that).
39 posted on 02/06/2013 8:39:28 AM PST by ZirconEncrustedTweezers
("I'm not anti-anything, I just wanna be free." - Mike Muir)