Motorcycle Consumer News did a test of them and found they were of little benefit, if any. They tested them in both motorcycle and car tires. They are the most independent source of such reviews that I know of, because they at least make an effort to conduct objective tests with measurable results, not subjective impressions. And just as important, they do not accept advertising, so they're not swayed by that.
Of course they got a nasty letter from the Dyna Beads folks afterwards.
MCN's reply was that Dyna Bead should be thankful they weren't even more negative, considering dubious claims by the company of "up to 50%" longer tire wear.
Whitehorse Press is going out of business so it's time for a final sale. Signed copies of my book are now $10 with free shipping in the U.S. while they last.
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