Alingment
 

Recently took delivery of a 2010 roadster, 19k miles with the sports suspension. The tires on all sides are quite worn on the outside inch and a half or so, inside tread is good. Is this normal tire wear or am I horribly out of alignment?

Sounds like an alignment problem. Getting the alignment checked is cheap (often free). Ask around for recommendations on shops in your area.

I would start with checking the air pressure, They might have been under inflated to begin with.
Dealers sometimes don't double check tire pressure and may leave them under inflated.


EDITED: meant under not over

If its the oem RE050, and the uneven wear is over 19k miles, you are relatively not "horribly" out, but it is indeed opposite of the wear pattern you should see, unless you track/mountain run often.

Over inflation - I would think that wears the middle of the tires more and not the outside?

Get it checked out, no point of having a sports car that's out of alignment, as it directly affects how the car handles.

Lol Yes I meant under not over :)

not normal at all. summer tires wear out like 8k-10k miles for me.

Too much toe-in (alignment) or the previous owner flipped the tires to have the inside mounted to the outside.

that might be.. if these are the factory advan sports or 050A's, not a good idea though..

Sounds like the problem I had with my fronts when my Z was new. Wore the outside shoulder off in probably 3-4000 miles. It was the front toe that was out that caused the problem. Once I got the toe zeroed, the excessive wear went away.

Thanks everyone. I went an alignment shop and the guy thinks that my issue was due to improper inflation. In may be overacting here. In just purchased new rubber from one of the gentlemen on the site here. I'll put them on and watch the wear carefully.