DOCTOR PRELOAD® Temper Companies
Temper Axle Products Corporation PO Box 1127  -  Fonda, NY 12068 USA
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The   only    recognized   engineering   standard  for adjusting  heavy-duty truck wheel bearings is SAE J2535 by the Society of Automotive Engineers.   This specifies target settings  of 500 to 1000 pounds for drive and trailer axles and 250 to 500 pounds for steer axles. DOCTOR  PRELOAD  achieves the J2535 standard’s settings with a  quick, simple and reliable process that can improve tire life by as  much as 300%!   J2535 was developed by engineers from the bearing  and seal manufacturers. 
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