Racing Rearend Build - Building The Ultimate Rearend, Part 2 Photo Gallery
The Joe’s Racing hub spacer slides between the inner and outer hub bearings. Notice the threaded collar on the end. You can spin the collar to either shorten or lengthen the spacer to set the proper preload. Once it’s right, you can lock it down by tightening the set screw. Then, every time you tear the hub down for maintenance you can be confident the preload will be correct on reassembly.