JConcepts 4156-02 1.9" Rock Bumps (4.25" OD) Green Compound Crawler Tires (2 Pack) Roadname_QNSL Training Mode (patented):

Training Mode (patented):

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JConcepts 4156-02 1.9" Rock Bumps (4.25" OD) Green Compound Crawler Tires (2 Pack) Roadname_QNSL Training Mode (patented):JConcepts 4156 02 1. 9" Rock Bumps (4. 25" OD) Green Compound Crawler Tires 2 Pack When it comes to competition, its hard to beat a pin style tire. JConcepts introduces the Rock Bumps tires specifically designed for 1. 9 Sporty Mini competition. The name suggests similarities to a popular dirt and all terrain tire used for years in the #gojconcepts line up; the Goose Bumps. The hefty surface area of the pins, combined with horizontal and vertical