How to Measure a Hub to Determine the Right Grease Cap to Use

Published 04/16/2014

Question:

How do I measure my existing grease cap to be sure I get the correct size? My trailer takes a 23-105 12x2inch 6000lb brake it that helps.

asked by: Teresa

Expert Reply:

To measure for a grease cap you will need to use something that can provide a very accurate measurement such as dial or digital calipers. Then you will measure the diameter at the center of the hub where the grease cap will fit. Grease cap # DC250L-DCRP would fit a 2.44 hub bore. I have included a picture that shows where to measure.

Another way that you can determine the grease cap needed is to pull the hub and get the inner and outer bearing numbers stamped into the metal of the bearings. With those numbers I can determine a lot about the trailer including what size grease cap is needed.

expert reply by: Michael H