Narrow is good for deep snow due to resistance and tendency for the wider tire to plow, but most of us seldom if ever deal with true deep snow as it is as likely to high center many Subaru models and other passenger cars. We deal mostly with plowed roads with packed snow/ice an/or up to 1" of wed/dry snow. These conditions are where siping rules.
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I am a Commodore PET --- Now get off my lawn you kids...
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