25580 Trailer Wheel Bearing with 25520 Race
This listing includes a 25580 tapered roller bearing cone and matching 25520 race (cup), a common heavy-duty bearing set used in trailer hubs for many 6-lug and 8-lug wheel configurations.
Designed for trailer spindles with a 1-3/4 inch bearing journal, this bearing configuration is frequently used on axles rated between 5,200 lb and 8,000 lb depending on the hub design.
R&P Knowledge Hub
Tapered roller bearings are designed to support both radial loads (weight) and axial loads (side forces from turning or braking). This makes them ideal for trailer wheel hubs where multiple load directions occur simultaneously.
The bearing cone (rollers and cage) installs on the spindle, while the race presses into the hub. These components must always be used as a matched pair to maintain correct bearing geometry and load distribution.
Engineering diagram showing tapered roller bearing dimensions used in industry specifications.
Bearing Dimension Reference
- d – Bearing bore (spindle diameter)
- D – Outside diameter of race
- B – Cone width
- C – Cup width
- T – Total assembled width
- r – Chamfer clearance radius
Technical Specifications
| Specification | Value |
| Bearing Cone | 25580 |
| Bearing Race | 25520 |
| Inside Diameter (d) | 45.618 mm / 1.796 in |
| Outside Diameter (D) | 82.931 mm / 3.265 in |
| Total Width (T) | 25.4 mm / 1.000 in |
| Cup Width (C) | 19.05 mm / 0.750 in |
| Cone Width (B) | 25.4 mm / 1.000 in |
| Bearing Type | Single Row Tapered Roller Bearing |
| Approx Weight | 0.54 kg |
Common Trailer Applications
This bearing set is commonly used in heavy trailer hubs including:
- Many 6-lug trailer hubs
- Many 8-lug trailer hubs
- 5,200 lb trailer axles
- 6,000 lb trailer axles
- 7,000 lb trailer axles
- Some 8,000 lb trailer axles
Always confirm the bearing numbers stamped on your existing bearing or race before ordering replacement parts.
