I would. Typically I do them when I do front brakes on a RWD vehicle. In 'MY' driving conditions that works out to about every 30,000-35,000 miles. IMO 64K is a lot of miles to have driven w/o repacking wheel bearings. 50,000 miles would have been my limit. What kind of vehicle is it? Did you check a shop manual or the OM for the mfgs recommendation?