Specifically designed with the highest crawling performance in mind the Rocx is a winner right out of the package. JConcepts has pulled out all the stops to ensure a competitive product. Starting from the Soft Sticky Green compound, detailed tread, tire over insert packaging all the way down to the "Peachy-1" medium density memory inserts, JConcepts is striving to set a new standard. Please make note that the Rocx tire is a directional tread pattern and the first crawling tire designed with specific left and right marked indications. Please mount the Rocx tires accordingly. Although JConcepts crawling representatives report that running the Rocx tires as indicated produce the best balance of grip in most conditions, it is highly recommended that everyone experiment with personal testing to see what works best in each individual location.