For many years the standard option on the Team Associated 2wd vehicles has been a proven bearing front wheel and pin-drive rear wheel setup. Times have changed, JConcepts - Mono 12mm hex wheels are the latest accessory available for the Team Associated B4.1 buggy. With the recent release of the Team Associated's 12mm hex conversion, converting to a more durable interchangeable wheel setup is easier than ever. JConcepts replacement wheels are designed in the popular dish style and available in bright white and fluorescent yellow. When Team Associated makes an update, JConcepts delivers. The Mono wheels are the maximum size allowed under ROAR rules and make a statement with their large appearance, slight concave dish shaped design and superior inner rib design. The wheels incorporate an outer glue catch that resists excess glue from running down the wheel face during the gluing process. JConcepts wheels are manufactured using advanced techniques to ensure trueness and durability and are branded with the small JC logo for brand identification and authenticity. To use the 12mm hex wheel on the B4.1 it requires JConcepts part # 2091 clamping hex for the rear and the Team Associated hex conversion for front along with JConcepts part # 2135 clamping front hex. Mono 12mm hex wheels are a direct bolt-on and correct offset wheel for the Kyosho RB5 line of buggies. Please note while running these wheels on the Kyosho RB-5 its necessary to run a locking style wheel nut JC #2089 (blue) or #2090 (black) in the rear to have proper thread engagement into the wheel nut. JConcepts front wheels are only designed for running the standard configuration width (wide width) in the front. Running without a locking rear wheel nut or running the front-end in a narrow configuration can cause potential problems. - Fits B4.1 front, B4.1 / B44.1 rear with adaptors - Popular dish styling and detail - 4 wheels included per package - Available in bright white and fluorescent yellow - Vent holes - Advanced manufacturing process and durable material - Fits Kyosho RB5 as a direct fit