The new Urban Iki MTB / ATB adapter is a super smart new solution for mounting on bikes with A head stems or cut steerer tubes.While the old adapter needed 19mm of steerer tube, the new one is only 4mm thick and can fit on a standard 1-1.8 diameter fork. That means you dont need to worry about it interfering with your cable routing or stopping the handlebars turning all the way. Basically, Urban Iki is now compatible with a far wider range of bikes than ever before.The adapter also comes with an extension to add the windshield, and if you dont want the shield then theres a little cap supplied to cover the mounting system keeping things nice and neatMounting is simple and quick just like all other Urban Iki products