Trailer Bearing Race 25520 Cup for 25580 Bearing 5200-10000 lb Axles New

Industry-Standard Race/Cup | Pairs with 25580 Bearing | Precision Machined

Item Specifics

Description

Trailer Bearing Race (Cup) — Part 25520 — For Use With 25580 Bearing

This is the outer race, or “cup,” that the 25580 tapered roller bearing rides in in most trailer hub assemblies. If you’re rebuilding a hub and replacing the bearing, it’s strongly recommended to replace the matching race at the same time — reusing a worn or pitted race with a new bearing leads to premature failure and uneven wear, even if the old race still looks okay at a glance.

This is an industry-standard race number used broadly across trailer axle brands, not a proprietary part, so it fits wherever a 25580 bearing is specified. It’s a component in multiple hub/bearing kits spanning 5.2K through 10K axle capacities, meaning the same race number covers a wide range of trailer sizes — from single-axle utility trailers up through heavier tandem equipment trailers.

Common Applications:

• Inner race on #42 spindle hubs (paired with 25580 bearing)
• General-duty trailer axles, 5,200–10,000 lb range
• Full hub rebuild kits alongside 25580, 14125A/387A bearings, and seal

Why Replace the Race With the Bearing:
Bearings and races wear together as a matched pair. Installing a new bearing into an old, worn race transfers that wear pattern to the new bearing almost immediately, shortening its life dramatically. Always replace races and bearings as a set for a proper rebuild.

What’s Included:

• 1x Bearing race (cup), part 25520

Compatible With / Cross Reference:

• Pairs with bearing 25580
• Used in hub kits: 5.2K, 6K, 7K, 8K, and 10K General Duty axle applications