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I recently bought a set wof wheels and tires that had been stored for several years. The tires have almost full tread depth so I'd like to use 'em up. But they are very hard due to age and consequently ride harshly and don't grip very well.
I read somewhere about a compound used by drag racers to soften the surface of drag slicks.
Is there a similar product that will soften up these old Goodyears?