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20A continuous / 25A burst current
Rock Bumps pin / bar design
Aluminum adds 13 grams each for a total of 52g for the set
Thin profile and tight tolerances to allow a scale look with functionality for years
JConcepts | Rock Bumps - 1.0" 63mm OD Tires (Sold By Pair) (4128-02) FMS Fcx and Smasher parts 20A continuous / 25A burstWhen it comes to competition, its hard to beat a pin style tire. JConcepts introduces the Rock Bumps tires specifically designed for 1. 0 mini comp crawler 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 connector bars bridge together walls of grip to flex, pivot, and conform to just