Challenge Tires Gravel Grinder Open Tubular

Challenge Tires Gravel Grinder Open Tubular
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Challenges Gravel Grinder Open Tubular is the tire you need to make your mark in the gravel racing scene. It pairs Challenge's supple 260tpi tire casing with a smooth-rolling center tread and aggressive shoulder knobs for great riding characteristics, high speeds, and excellent cornering traction.

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