How to Determine the Correct Replacement Trailer Idler Hub

Question:

Is product 84555UC1 the correct hub for a 5 on 5 1/2inch with a spindle that has a inner size of 1 3/8inch that narrows to 1 1/16inch for the outer bearing?

asked by: Keith

Expert Reply:

To determine the correct hub for your trailer you will want to go by the inner and outer bearing numbers stamped into the metal of the bearings. With these numbers I can determine which hub is a correct fit. Hub # 84555UC1 uses inner bearing # L68149 and outer bearing # L44649.

The inner bearing # L68149 has an inner diameter of 1.378 inches. Outer bearing # L44649 has an inner diameter of 1.063 inches. Bearing measurements are in decimals and go to the thousandth of an inch because they have to be precise. Based on the fraction measurements you have provided the bearings match but you will want to go by the numbers on the bearings to confirm.

The bearings, seal, and grease cap are all included. The races are already pressed into position inside the hub.