Interesting topic. I can certainly understand their concern. If you were to get in an accident, you could sue the hell out of them, and they would have no real recourse.
Of course, we sell Drag Radials and slicks in pairs, and we simply state that these are special purpose tires, and what you do with them is your responsibility. It is a little different, because we can present racing tires as for off-road use only, whereas Blizzaks are specifically for public road use on snow and ice.
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Moxie Racing