The plug-in axle coupling is ideal for flat, easily accessible dropouts. A Click & Crooz coupling is already integrated into the plug-in axle. This allows all Croozer trailers with a lockable drawbar to be attached. To prepare your bike for coupling with Croozer trailers, you only need to replace the existing plug-in axle with this model. Sizes (diameter x length x thread pitch): 12 x 165 x 1.5 mm, 12 x 178 x 1.5 mm, 12 x 180 x 1.75 mm, 12 x 198 x 1.75 mm, 12 x 209 x 1.5 mm, 12 x 209 x 1.75 mm, 12 x 229 x 1.5 mm, 12 x 229 x 1.75 mm.