The Knucklebuster FacebookTweetPin Knucklebuster built by Speed City Cycle. The Knucklebuster was Best Chopper & Best in Show Winner at the Roadbike Metric Bike Show. FacebookTweetPin Related Posts Republic Harley Chopper 2006 Lincoln Mark LT Chopper Bright and Sweet Chopper Fire It Up Chopper Jon’s Yamaha Maxim High Plains Chopper