How To Determine Axle Capacity of Trailer with 4 Lug Hubs with Brakes

Published 01/08/2020

Products Featured in This Question

Dexter Trailer Idler Hub Assembly for 6,000-lb Axles - 6 on 5-1/2

(875)

$148.32

Dexter Trailer Hub and Drum Assembly for 2,200-lb Axles - 7" Diameter - 4 on 4

(1077)

$144.44

Dexter Trailer Hub and Drum Assembly for 2,200-lb E-Z Lube Axles - 7" Diameter - 4 on 4

(600)

$124.27

Trailer 4 on 4 Hub & Drum Assembly - 2,200 lbs. Axles - Hydraulic Brakes

(29)

$82.85

Dexter Trailer Hub and Drum Assembly for Hydraulic Brakes - 2,200-lb Axles - 4 on 4

(29)

$105.54

Replacement Trailer Hub Bearing - L44649

(2098)

$19.77

4" Carbon Fiber Digital Caliper

(26)

$12.14

Question:

This an older 4 lug axle with i believe are brakes, how do I find the weight capacity for it ?

asked by: William B

Expert Reply:

The only way to know for sure is to check your bearings. That being said, the most common 4-bolt configuration is a 4 on 4 bolt pattern, which are typically found on 2,000 lb to 2,700 lb trailer axles. The only 4 on 4 bolt pattern hub and drum assemblies we carry are for 2,200 lb axles and use # L44649 inner/outer bearings. See below.

Compatible with 7 inch x 1-1/4 inch electric and hydraulic brakes
# 8-173-16UC3 - Includes bearings, races, grease seal, standard grease cap and lug nuts.
# 8-173-16UC3-EZ - Includes bearings, races, grease seal, E-Z Lube grease cap and lug nuts.

Compatible with 7 inch x 1-3/4 inch hydraulic brakes
# 8-276-5UC3 - Includes bearings, races, grease seal, standard grease cap and lug nuts.
# 8-276-5 - Includes races. Bearings, grease seal, grease cap and lug nuts sold separately.

You can either look for the bearing number stamped on the bearing itself, or use a caliper like # PTW80157 to measure the diameter of the spindle where the bearings ride. A spindle that uses L44649 will measure 1.06 inches.

I've attached a couple helpful articles for you to check out at the bottom of the page as well.