031-030-02 - 25580 Inner Bearing Cone

The 031-030-02 – 25580 Inner Bearing Cone is a tapered roller bearing designed to support both radial and axial loads inside the trailer hub. Installed as the inner bearing, it works in conjunction with a matching bearing cup (race) to allow smooth, reliable hub rotation under heavy loads.

Commonly used on Larson Cable Trailers, this bearing cone is typically found on 8,000 lb trailer axles and similar heavy-duty hub assemblies.

Specifications:

• Part Number: 031-030-02
• Bearing Number: 25580
• Component Type: Inner bearing cone (tapered roller bearing)
• Inside Diameter (ID): 1.750 in
• Outside Diameter (OD): 3.265 in (at rollers)
• Overall Width: 1.030 in
• Material: Hardened bearing steel
• Application: Inner wheel bearing for trailer hubs

Fitment:

• Commonly used on 8,000 lb trailer axles
• Typically paired with 25520 bearing cup (race)
• Used with compatible hub seals (such as 10-36 style seals)
• Verify spindle diameter and hub compatibility before installation

Notes:

• Inner bearing cone only race sold separately unless noted
• Always replace bearing cups and seals when servicing bearings
• Proper greasing and preload adjustment required during installation
• OEM-style replacement bearing