Tips for Determining Square Trailer Axle Capacity  

Based on your images it does appear your trailer was built to have double eye springs rather than a slipper spring. For this you will need to measure your current mounts from bolt hole center to bolt hole center. We have the 3,500LB leaf springs…

The 2x2 inch square axle is likely 3,500 lbs or less capacity. I would need more spindle dimensions or bearing numbers to assist. If you pull a hub and measure at the spindle where the bearings and seal ride using the digital caliper like #PTW80157…

The big difference between 3,000 lb axle trailer brake assemblies and 3,500 lb trailer axle brake assemblies is the width of the brake pad. The 3,500 lb kits like the #23-468-469 are 2-1/4 inches wide and the #K23-472-473-00 which fits the 3,000 lb…

Looks like you found the chart that Jeff D made that shows common axle capacities based on diameter: Typical Axle Diameters Based on Axle Capacity - 1,000-lb - 2,000-lb Axles: 1-1/2 inch - 1-3/4 inch diameter - 3,500-lb Axles: 2-3/8 inch diameter -…

Most trailer axles will have an ID tag or sticker located on the axle that will have information like manufacturer and weight capacity. However, over time the numbers on these IDs will wear off or even fall off the axle completely. If the axle is…

The Electric Trailer Brake Kit - 10" - Left and Right Hand Assemblies - 3,500 lbs #AKEBRK-35 will bolt onto the standard brake flange like #4-35 that is 2-7/8 inches on center and 4 inches diagonal on center. I've attached a photo to assist.…

If you cannot locate any type of information on the trailer itself, either on the axle or somewhere on the frame, then measuring the axle diameter can usually give you a good idea as to its capacity. When measuring the axle, you will want to measure…

It sounds like you have the 4-Leaf Double-Eye Spring for 3,500-lb Trailer Axles #e54SR which are 25-1/8". This measurement is taken with the leaf spring relaxed from center of bolt hole to center of bolt hole. With them holding the weight of the…

It is highly recommended that the spring seat be at minimum tack welded to the axle. There have been issues that have resulted from the seat not be welded to the axle. If you do not have access to a welder, I recommend taking the trailer to a local…

That is a good question but the Trailer Idler Hub Assembly for 3,500-lb Axles #AKIHUB-545-35-K can absolutely be used on your axle rated for less than 3,000 lbs. What matters is that you have the same #L68149 inner bearing, #L44649 outer bearing and…

Square axles normally don't have spring seats like a round axle but do have a hole for the leaf spring bolt to fit into. Take a look at the CE SMITH #CE33201GA-HUB for a visual. The U-bolt mounting kits will have a hole in the center for the…

A bearing, no matter where it is made, has to meet certain standards for use in the United States. With that said there are some cases where despite having to meet these standards, the US made product is better. When it comes to bearings though I…