Specially made replacement axles for all wheelsets.  These axles are precision ground to improve rolling and are sized to fit the standard wheelset frame or with off-the-shelf 2mm ball bearings.  Made from hard-drawn stainless steel, these axles will not wear out.  Parts are mildly magnetic due to hard-drawing process.
NEW! Narrow gauge axles now available!  2-studs shorter than standard axles, use these when building trains for narrow gauge tracks (2 studs between the rails as opposed to 4).