This left adaptor end cap for DT Swiss fits most DT Hubs including the 240, 350 and 440 and is also compatible with the Spline series of wheels. Choose the appropriate right side adaptor, (sold separately) depending on whether you are using a standard freehub or an XD Driver. This will convert your hub to a 135mm (MTB) QR. Compatible with most DT MTB hubs including non-disc, 6-bolt disc and centerlock disc. Please find here all details for converting your DT Swiss wheels or hubs into other axle sizes here. | Dt Swiss | 240S Left Adaptor Mtn Qr Hubs Black