To verify a trailer axle’s rating, first inspect for a tag, sticker, stamp, or plate on the axle tube (often near the center or spring seats) listing “Capacity” (e.g., “Capacity 3500”) or “GAWR” (Gross Axle Weight Rating) with a number in pounds. If illegible or missing due to wear, measure the outer diameter of the axle tube using calipers or a tape measure at a clean section away from welds or brackets, held parallel to the tires.
Axle Tube Diameter Chart
Common diameters correlate directly to standard ratings:
| Diameter (inches) | Typical Capacity (lbs) |
|---|---|
| 1-1/2 to 1-3/4 | 1,000 to 2,000 |
| 2-3/8 | 3,500 |
| 3 | 5,200 to 7,000 |
These measurements provide a reliable estimate, as axle tubes are standardized by size for load-bearing strength.
Additional Verification Methods
Check wheel bolt patterns: 5 on 4.5″ often indicates 3,500 lb axles, while 6 on 5.5″ suggests higher ratings like 7,000 lbs. Inspect hub bearings (stamped numbers like L68149 inner for 3,500 lb) or the trailer’s VIN plate for GAWR confirmation. Always cross-reference with the trailer’s total GVWR for safety,
Contact Us
Axle trailers are essential vehicle components for many tasks and industries — commercial or recreational. Weifang Top is an award-winning dealer and a one-stop shop for all your trailer needs.
Our expert team will help you find the right trailer options, and we’ll inspect, customize and deliver it straight to you.
Our vast inventory ensures you can find a trailer that fits your requirements, application and budget. Browse our high-quality trailers or contact us to learn about our products and services.
For more details on installation and specifications, visit our official product page or contact our technical support team for personalized assistance.
