These are for Current Ferrum Bikes Frame Owners Only Please – We will verify our records to ensure of this, any non-owner order will be canceled kindly.
Contrary to popular belief, these are not proprietary. Allotec Taiwan makes these and the inserts from Paragon Machine Works also work as a substitute. We do have the 3d files for these if you’d like to machine your own. Feel free to contact us for more information.