Overview
The Koyo 15123/245 is a matched tapered roller bearing set that includes the 15123 cone and 15245 cup. Manufactured in Japan by JTEKT, this premium-quality bearing is ideal for trailers, caravans, and American-style axle hubs requiring reliable radial and thrust load handling. Trusted by OEMs and repairers for long service life and precise fitment, this set is a direct replacement for standard trailer hub bearings.
⚙️ Technical Specifications
| Specification | Details |
|---|---|
| Brand | Koyo (JTEKT) |
| Part Number | 15123/245 |
| Component | Tapered Roller Bearing (cone + cup) |
| Inner Diameter | 31.75 mm (1.25″) |
| Outer Diameter | 62.00 mm (2.44″) |
| Cone Width | 19.43 mm |
| Cup Width | 15.88 mm |
| Material | Chrome Steel |
| Dynamic Load Rating | ~44.8 kN (approx.) |
| Country of Origin | Japan |
✅ Why Choose This Bearing?
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Includes both the 15123 cone + 15245 cup—ready for direct hub fitment
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Made in Japan to ISO/ANSI standards by Koyo
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Handles high radial and thrust loads—ideal for trailer hub and spindle systems
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Compatible with many American-style trailer hubs and Dexter components
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OEM-quality tapered roller bearing for long-lasting performance
🚚 Applications & Use Cases
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Common fitment in trailer hub rebuilds using Dexter-style axles
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Ideal for caravans, boat trailers, and light industrial trailers
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Frequently paired with inner bearings like 25580 or 30210 for 3.5–4.5 T axles
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