[nbleak21]

I haven't touched an Aveo in years, but I'm pretty positive you can get 13's on the rear, not sure about front. Be mindful of changing the revolutions per mile if you go that route though.

Alloys vs steelies: if you can get a set of miata Daisey wheels on there (I believe they are both 4x100) you'll have a decent weight savings, and then just pizza pan them (or the steelies) for added aero gains.

I'm unsure of the best LRR tires out there now, but I know when I switched over from some stickies (falken azenies) to a used set of Michelin harmony's I noticed a 2-3mpg improvement, but I also noted crap poor rain performance too.