To make the world of child seats a little more accessible to everyone and to achieve the greatest possible compatibility between bike manufacturers and Bobike front seats, we have developed the A-Head Adapter Plus, a rugged, slim mount that allows you to mount your Bobike front seat on bikes with threadless stems. The A-Head Adapter Plus is designed to accommodate adjustable stems, e-bikes with a monitor or controller at the top of the stem and MTB with 1" 1/8 stems. Compatible with all Bobike front seats with front head tube mounting system. With the A-Head Adapter Plus you can easily mount your Bobike front seat with a Bobike windscreen