As for tires, I just put on 245/45-18 on the front and 275/40-18 on the rear on the stock 18" wheels. These tires will also fit on the rims you want to buy. Unless you are having alignment problems to begin with you shouldn't need an alignment. Mounting and balancing can range from free to $30/tire or maybe more from my experience.
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"America.... still builds rockets!"
Vette: 355 cid, 400 rwhp
'13 CTS-V Coupe: 6.2L LSA, 556HP
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