To use the twist stem or other ahead stems in combination with threaded forks, you can easily replace your classic stem with the by.Schulz Ahead Stem Adapter for Stems. The heavy-duty aluminium handlebar tube is virtually a threadless steerer extension to which you can mount compatible components. Thanks to its high stability, the adapter can be mounted on hybrids, city bikes or e-bikes and is even adjustable in height without spacers.