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The ones I saw back in the day only cut maybe 3/16" wide .With say racing slicks the tires were grooved to match track conditions .Any praticular sprint car might carry a dozen different tires .

45-50 years ago we used to groove the racing slicks tires/tyres used on sprint cars running on dirt tracks.Go karts etc . The tool was just like a big soldering iron with a u shaped tool that could be adjusted for the depth of the groove .Smelly job,phew .

Tie regrooving meaning rail road tie or tire minus the r ?If it's tire I'm not so certain they can all be regrooved . Truck tires for example used to be stamped if they could be regrooved but that was decades ago . Google may know .