I am looking for a slightly taller and wider alternative to the OEM 245/70R17's on a 17x7.5" factory aluminum rim. This is for a 2wd Silverado. I am interested in a 275/65R17. Does anyone have experience substituting these sizes or can you recommend a similar size. Changing the factory rims is not an option at this point. I'm looking for a "street attitude" appearance without greatly disturbing speedometer calibration or causing abnormal tire wear. Thanks! TLAR640