After 12k miles, I need a new set of rear tires. I jumped to 245/35/19 (f) and 275/35/19 (r) from the stock 17's. Has anyone done this jump, and if so, do I need to recalibrate my odometer to get accurate mileage. Where do I get this done at, and about how much?

 

Try tirerack.com for tire dimensions.

 

Haven't heard of anyone getting the speedo and odo recalibrated on our cars. Your overall diameter in the rear is very close to the OEM wheel so you will be fine.