I have a set of 4WD Schumacher yellow mini pins, with Schumacher medium green inserts front and back, mounted onto white ZX5 wheels.
The wheels, front and back, have a 12mm hex mounting and im lead to believe that they will also fit Tamiya's as well as Kyoshos...they may even fit other 4WD 10th's.
£22 posted (Recorded Delivery), Paypal as a gift please