12K-15K Trailer Spindle
This 12K–15K trailer spindle is engineered for Dexter-compatible heavy-duty builds, from hotshot flatbeds to gooseneck equipment haulers, where high axle capacity and dependable service life are critical. This design supports widely available 12K and 15K hubs, drums, and brake hardware, streamlining parts sourcing and maintenance.
Machined from heat-treated, high-strength steel, the spindle features precision-finished bearing journals (2.625″ inner / 2.250″ outer) and a 3.125″ seal land. This ensures smooth operation under high loads, excellent alignment, and extended component life.
| Recommended Fit For: | Heavy-duty, utility trailers. Dexter, Dexter-compatible axle type |
| Heat Treatment: | Yes |
| Weight Rating: | 12,000 lbs - 15,000 lbs Axle rating |
| Product Weight: | 28 lbs |
| Product Dimensions: | Inner Bearing: 66.675mm, Outer Bearing: 57.15mm, Wheel Seal: 79.375mm, Nut: 44.45mm |
| Compatible Parts: | Inner Bearing: TIMKEN 3984, Outer Bearing: TIMKEN 28682, Seal: TIMKEN 370014A / 10-56 Seal |
| Warranty: | 1-Year Limited Warranty |
Description
Each unit is thoroughly inspected for dimensional accuracy, material integrity, and proper runout before shipping. The spindle ships bare (no hardware or hub components) and is backed by a 1-year limited warranty for peace of mind. Professional installation is recommended to ensure correct weld-in alignment and longevity.
Whether you’re upgrading a 12K axle, replacing a damaged 15K wheel-end, or fitting out a new build with quality hardware, this spindle delivers robust compatibility and trusted performance under demanding conditions.
Is this the right spindle for the job?
Trailer Compatibility – Parts List
This spindle is designed to fit the standard #99 spindle family used across most Dexter trailer axles in the 9K–10K range.
Compatible parts/hardware include:
- Inner Bearing: TIMKEN 3984
- Outer Bearing: TIMKEN 28682
- Seal: TIMKEN 370014A / 10-56 Seal
Confirm on your trailer: pull the hub and read the numbers stamped on the bearing/race (cup).
If you’re still in doubt, contact us and we’ll help you find the right product.
