Size 21-- OTR Rib Tires

Compare tires at a glance using our easy test score^® system. Our proprietary algorithm factors in performance, expert insights, user reviews, and Uniform Tire Quality Grading (UTQG) scores.

Four criteria factor into easy test score^®

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  Consumer reviews

  Research based on customer reviews and buying behavior

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  Treadwear

  The lifespan of a tire based on wear performance

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  Traction

  The ability of a tire to grip to the road in wet conditions

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  Expert ratings

  Input from veteran tire industry experts