TieDown SuperLube spindles...they have a grease fitting in the end of the spindle to allow on-trailer wheel bearing grease change...have a stainless steel sleeve that covers the spindle shaft where the seal rides. This sleeve, although very hard, is also very thin and easily damaged if you are not aware that they are there. TieDown does not sell to the 'general public' so getting the sleeves from them is not an option for an individual. Does anyone know of an outlet where these sleeves can be purchased?