From our American colleagues at HPI USA comes this great tutorial showing you exactly how to make your Wheely King into a bonafide rock crawling monster! Rock crawling as an RC sport is jumping in popularity, with national-level events and magazine articles appearing in the US, Japan and other countries. In Europe, where trials courses have been popular for years, rock crawling is gaining popularity as a unique, fun and skilled sport. We're happy to present to you phase one of HPI's Crawler King Conversion!#87602 - 4WD Conversion Kit for the Wheely King. We've also got action video of the conversion - check it out here!