If played right by the guy with the ride, he gets to rail a girl outside of his reach because he does have a nice car (or truck... something shiney, tasteful and/or loud)
"Use me for the ride, I'll use you for the hide"
"who, that geeky guy?"
"yeah, he's nailing Cindy Hotbody!"
"ooh yeah! she's on him because he's got that sweet dub!"
"damn, she's a tirebiter"
Conversely, it CAN refer to a guy who goes with a girl solely for HER nice wheels.
Whenever the definition changed to a car freak is beyond me. Looks like a media/cultural-generated propagation of the high maintenance gal. (better than its previous definition, then, perhaps?)
Jerry: Yeah, she's been fucking everyone in our car club.
Greg: I know, she's such a tire biter.
Jerry: ...But she gives good head
Greg: Dude WTF?
She was such a tire-biter in lacrosse that she averaged two goals per game.