Are our cars rear tires supposed to lean in like so / ? Not as much but still, my rear driver tire leans in toward the car at an angle. This happens more when driving. If driving behind the car, you can see the front tire. Looks like the car is driving sideways, heh. I was told that Audis were designed like this.

 

I would go with a "No"

Usually your tires should ride vertical. If not, there are a lot of things that could be going on. I would go to a good tire shop and have them check it out. Most of them will do it for free with hopes of getting your business. Riding at a slant will wear your tires out really fast though. Basically I would say it is time for new suspension springs or struts because yours are too soft.

That being said, there are a lot of ways that your car's tires could have been purposely put at a slant too. Have you seriously lowered your car? Or maybe you have one heck of a sport tuned ride package. Because then it is normal. Not healthy, but normal. Have you ever looked at a seriously lifted truck (like the baja style ones), their tires slant in because their springs are super soft. Have you ever seen a seriously low low-rider, their tires slant because they have no suspension (and they are bending stuff).

Food for thought. It could be normal, it could not be, it depends on what you have on the car.

 

if you have bigger wheels and low suspensions, its probably negative camber. you should rotate your tires around to minimize excessive wear, talk to a tire place about this and think about getting an alignment.

 

negative camber reduces understeer under hard cornering, id leave it like that...

 

Will increase wear on the inside of the tires, no?

 

Yes will wear out tires faster. Much faster. Rotate the tires reqularly get more life but not near as much as being properly aligned