ThunderHex Bearings are designed to work with ThunderHex Stock, a revolutionary new way to use hex shaft. By piloting a ThunderHex shaft's rounded corners, this bearing results in a smooth-running final result that is perfect for many axle applications.

NOTE: This Tight Press ThunderHex bearing has a smaller inner race than a standard ThunderHex bearing, resulting in an extremely tight fit. For a slip fit, and the best performance use a lathe to turn down a standard piece of ThunderHex or Hex stock to a 13.72mm diameter.