THE RACES start with vacuum de-gassed alloy hardened to Rockwell C-64. These high precision races are cryogenically treated not once, but three times during the final “super polishing” phase. Cryogenic treatment means taking the races down to minus 300º fahrenheit to normalize the crystalline structure of the material so that the races will resist the hardness of the ceramic balls and gets the maximum wear potential. This critical treatment to the races is left out by many manufacturers, but not by Enduro.