Yeah Racing 1/10 Steering Wheel Adaptor w/ Aluminum Brake For Sanwa MT4 MT4S,
it allows you to add you style of Radio Transmitter wheel with any 1/10 Drift, On Road, Crawler or Any Wheels that has 12mm Hex. Also the brake disc starts spinning while brake caliper remains still.
Purchase here: http://goo.gl/UZFZDD
For more details, check it out here: http://goo.gl/UZFZDD