How to measure your bolt pattern
Purchasing the correct hub or drum is an important step in repairing your trailer axle.
See the answer with illustrations here.
There is simple and easy to follow steps to make sure you are getting the correct hub.
Step 1: Remove your hub or drum from your trailer axle.
Step 2: Measure your bolt pattern to identify what capacity your axle is, if it is unknown. Please see the following diagram to determine your bolt pattern.
Step 3: Now, you can also remove the front and rear bearings and seal. Once you remove the bearings, you will be able to read the number off the back of the bearings that correspond with a correct spindle size. If this number is not readable, you will be able to measure the inside dimensions of the bearing and seal in order to determine which one you need. Please see the attached pictures on how to do so.
Step 4: Pick the best hub or drum for your needs. If you are unsure, we would be happy to assist you in making the correct decision.