Review on Bike Fork Stem Extender - MTB Handlebar Riser Extension, Aluminum Alloy Head Up Adapter for Mountain Bike, Road Bike, MTB, BMX - Extended Edition (Brand New, Silver) by Athenasby Whitney

After installing this extension, there was a gap between the bottom of the extension and the bike's steering column, resulting in a large amount of movement in the steering system. The internal dimensions of the extension cord do not allow for correct installation of the extension cord. This problem can be solved by adjusting the internal dimensions of the extension to fit the bike stem, or by placing a spacer ring under the extension to close the gap between the extension and the bike stem.