This Urban Iki MTB / ATB adapter is a smart solution for mounting on sports bikes. With the MTB / ATB adapter you can easily mount an Urban Iki front seat on bicycles with a front fork tube with a diameter of 28.6 mm (1 1/8 inch). Just as all Urban Iki its mounting options, mounting is simple and quick. The adapter also comes with an extension to add the windshield, and if you don't want the shield then there's a little cap supplied to cover the mounting system keeping things nice and neat. Mounting is simple and quick just like all other Urban Iki products.