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I voted "rolling resistance". I prioritize fuel economy, and am generally of the opinion that I'll spend more money to make my car more efficient than will ever come back to me. Getting huge numbers on my fuel economy instrumentation is almost a game, and something I have pride in.
However, I find I'm in a somewhat unique position. With my engine swap, I destroy front tires, even when not trying to, and let's not talk about when someone shouts "DO A BURNOUT!".
I would honestly run the narrowest, lowest rolling resistance tires I could get away with, but even pressing the pedal to the floor in 2nd gear with the famous RE92s causes wheelspin, taking potentially hundreds of miles of life off of them each time I pull away from a stop, if I'm not careful. So, I've settled on something a little wider and sturdier, simply so they survive.
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