Tips for Determining Square Trailer Axle Capacity
Question:
I found a question that someone else asked about weight capacity of a square axle. I also have the same question about my 1 3/4inch square axle. The outer bearing is Tyson #09067 and inner bearing is Timken #15123. Also, I have a 5 on 4.5 lug pattern and 15 inch wheels. Are you able to help me find an approximate capacity for my axle?
asked by: Will
Expert Reply:
Square axles can be tough to determine capacity. Often times the same spindle fits a range of axle capacities. The best way to determine the capacity is to get the inner and outer bearing numbers stamped into the metal of the bearings like you did. The numbers you listed do not match any of the spindles we carry though so I was not able to determine anything from that. The bolt pattern of the hubs on the trailer is typically used on 2k-3.5k axles, most 15 inch wheel trailer setups have a capacity of about that range as well. The best recommendation I could make would be to stay on the low side of that range.
There could also be a plate on the axle itself that lists the capacity. The most common place to find axle capacity is on a plate or sticker on the trailer frame on or near the tongue. Sometimes its location on the inboard side of the frame.

Product Page this Question was Asked From
Square #84 Spindle for 3,500-lb Trailer Axles - 1-1/2" Wide
- Trailer Spindles
- Standard Spindle
- 1-1/2 Inch Wide
- Square
- For 3500 lb Axle
- TruRyde
more information >
Continue Researching
- Article: How to Tell the Weight Rating of a Trailer Axle
- Shop: 4-Leaf Slipper Spring w/ Open Eye End for 4,300-lb Trailer Axles - 26-1/4" Long
- Video: Review of CE Smith Trailer Suspension Parts - Standard Equalizer - CES86WR
- Video: Review of CE Smith Trailer Suspension Parts - Standard Equalizer - CES76WR
- Video: DeeMaxx Disc Brakes | Expert Insights from the Manufacturer
- Shop: CE Smith Triangular Equalizer for 1-3/4" Double-Eye Springs - 6" Long - Galvanized
- Shop: CE Smith Curved Equalizer for 1-3/4" Wide Double-Eye Springs - 7-3/4" Long - Galvanized
- Shop: etrailer Rust-Resistant 4-Leaf Double Eye Spring for 4K Trailer Axles - 26" Long - Dacromet
- Q&A: Are Trailer Spring Seats Needed for Square Axles with Leaf Springs?
- Q&A: Trailer Axle Weight Rating for 2 Inch Square Axle
- Shop: RV Bearing
- Shop: Dexter Heavy-Duty Shackle Link for 1-3/4" Wide Double Eye Spring Suspension Kit - Qty 1
- Shop: Dexter Single Axle Heavy Duty Suspension Kit - Double Eye Springs
- Shop: Tandem-Axle Trailer Hanger Kit for Double-Eye Springs - 2-1/2" Front/Rear, 5-7/16" Center
- Video: etrailer Rust-Resistant 6-Leaf Double Eye Spring for 6K Trailer Axles Review
- Video: All You Need to Know About the Dexter Trailer Springs Over-Under Conversion Kit
- Q&A: What is Salt Spray Rating for Galvanized etrailer Leaf Springs
- Search Results: trailer suspension parts
- Q&A: Hanger Spacing Dimensions for Installing Double-Eye Leaf Springs on a Trailer
- Search Results: hydraulic brake
- Search Results: flexible hydraulic brake lines
- Search Results: accessories and parts
- Video: Review of TruRyde Trailer Leaf Springs - Double Eye Springs - TRU62FR
- Video: DeeMaxx Disc Brake Kit Review
- Article: How to Accurately Measure Trailer Leaf Springs
- Shop: Gooseneck Hitch
- Q&A: Can Spring Seats Be Moved On A Trailer Axle Tube
- Q&A: How to Determine Square and Round Tube Axle Capacity
- Search Results: trailer jack
- Search Results: trailer axles