Just an observation My 15" by 5.5" steelies with hubcaps were nearly 6 lbs heavier per wheel than the Sparco Alloys I replaced them with ,sized 15" by 6" . I run 65 series LRR Goodyear fuel Max on both sets of wheels and did see a slight MPG improvement but I didn't track the improvement over the long term. The car handles much better on the wider wheel. Also as most of my daily drive is 65 MPH or better at times. I would not want to chance running on donuts. There is simply not enough tread to maintain traction in an accident avoidance situation.
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