Product DescriptionReduce the rotational mass of the sprocket adapter on your DoodleBug DB30, CT100, and MotoVox minibikes.This high quality sprocket adapter is machined from a solid block of aluminum for good looks and strength. The monocoque design makes it lighter and stronger than standard sprocket adapters, this piece not only looks good, it performs well. Less weight equals less power required to do the same job!This adapter has the standard 4.563″ register and uses sprockets with the common 6 bolt pattern on a 5-1/4″ bolt circleThis is the sprocket adapter only. No hardware is included