A trailer hub assembly has to match the spindle, bearings, seal, studs, wheel pattern, drum mounting, lubrication system, and axle application. A cross-reference number is useful, but a hub should never be ordered from the casting number alone.
Common trailer hub cross-references
| Common Reference Numbers | GBK Option | GBK Catalog Specification | What to Verify |
|---|---|---|---|
| Webb 2023 / 20231 | HLT20231-3T | Trailer hub assembly, 10 studs, 11.25" bolt circle, 16.5" x 7" outboard drum application | Spindle, bearing cups, seal, stud size, drum pilot, lubrication, and ABS configuration |
| Webb 2343 | HLT2343 | Pre-assembled trailer hub with studs and bearing cups | Axle application, bearing set, seal, stud pattern, drum type, and ABS provisions |
| Webb 23231-3T Gunite HT799RC Automann 150.T1201.S2 |
HUBL23231-3T | Trailer hub assembly, 10 studs, 11.25" bolt circle, outboard drum | Spindle, bearing and seal package, stud dimensions, outboard drum fit, and axle application |
What makes a hub assembly fit
- Spindle and axle: the hub must match the axle and spindle family
- Bearings: inner and outer bearing or cup numbers must be correct
- Seal: seal diameter, design, and lubrication compatibility must match
- Studs: quantity, thread, length, and bolt circle must match the wheel
- Drum mounting: confirm inboard or outboard drum design and drum pilot
- ABS: verify tone-ring and sensor provisions when required
- Lubrication: use the approved oil or grease system and compatible hub cap
Pre-assembled does not mean universal
A pre-assembled hub can reduce installation steps when the included bearing cups, studs, and related components match the axle. It does not eliminate the need to verify the spindle, seal, bearing set, wheel pattern, drum configuration, and ABS requirements.
Warning signs at the wheel end
Investigate a wheel end that shows lubricant leakage, contamination, abnormal heat, noise, looseness, damaged studs, metal debris, or repeated seal failure. The source may be a bearing, seal, spindle, hub, fastener, lubrication, or installation problem rather than the hub casting alone.
What to record before removing the original hub
- Hub casting or assembly number
- Axle and spindle identification
- Inner and outer bearing or cup numbers
- Seal number and measured seal surfaces
- Stud count, thread, and bolt circle
- Inboard or outboard drum configuration
- ABS tone-ring and sensor arrangement
- Lubricant type and hub-cap style
Browse GBK hub assemblies, brake drums, and related hub cover kits.
Send GBK the hub number, axle information, bearing numbers, seal number, and photos when the wheel-end configuration is unclear.
Cross-reference numbers identify possible replacement options. Buyers and installers must verify the axle, spindle, bearing, seal, stud, wheel, drum, lubrication, and ABS configuration before installation.
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