When it comes tohub and wheel bearings, many people assume there’s only one standard type. In reality, there are a variety of designs available for different loads, applications, and packaging constraints. Below are the four main types commonly used in automotive hub and wheel systems, along with their advantages, disadvantages, and typical applications.

1. HUB 0 – Split Tapered Roller Bearing

This is one of the more traditional configurations. In the HUB 0 configuration, two separate tapered roller bearings are mounted within the wheel hub (typically one inner and one outer). They must be precisely installed and adjusted (preloaded) using the correct torque to maintain bearing alignment and clearance.

Ventajas:
Suitable for high combined radial and axial loads.
Serviceability (if bearings and raceways are replaceable).
Robust in heavy-duty/demanding applications.
Disadvantages:
More laborious to set up (requires preload adjustment).
More susceptible to misalignment or improper torque errors.
More parts to maintain (two bearings).
Typical Uses:
Older or heavier vehicles.
Applications requiring bearing repair.

2. HUB 1 – Dual Bearing Rings in a “Press-Fit” Assembly

HUB 1 combines two bearing rings into a single housing. The bearings are then pressed into the wheel hub or steering knuckle and torqued accordingly. The assembly is sealed and lubricated for life and requires no further adjustment or lubrication.

Ventajas:
Easier installation compared to HUB 0 (fewer individual parts).
Maintenance-free (sealed, pre-lubricated assembly).
Reduced risk of improper field adjustment.
Disadvantages:
In the event of failure, the entire assembly typically must be replaced and cannot be easily rebuilt.
Less flexibility compared to split bearing methods.
Removal of press-fit bearings can be difficult or require special tools.
Typical Uses:
Modern passenger vehicles often have non-driven wheels.
Original Equipment Manufacturers (OEMs) want to reduce service complexity.

3. HUB 2 – Hub and Flange (Integrated Hub Surface)

HUB 2 is essentially an upgraded version of HUB 1: the bearing is integrated into the hub, which includes the hub mounting flange. In effect, you get the HUB 1 and the hub mounting interface, all rolled into one.
Ventajas:
Further simplified assembly (hub, flange, and bearings are integrated).
Better alignment (fewer interfaces) and reduced tolerance stack-up.
Quicker installation in the factory or on the assembly line.
Disadvantages:
Deteriorated serviceability—the entire bearing/hub/flange is replaced as a single unit.
If one component (bearing or flange) fails, the entire assembly is discarded.
More expensive replacement unit.
Typical Uses:
Many modern vehicles (especially drive wheels or high-end models).
Applications where manufacturing efficiency and alignment are a priority.

4. Hub 3 – Complete Bolt-On Assembly (Hub Bearing Assembly)

HUB 3 is a complete, ready-to-install assembly. It typically includes not only the bearing, hub, and flange, but also integrated sensors (ABS wheel speed sensors), seals, and sometimes dust covers. It’s a “plug-and-play” solution.
Ventajas:
Installation is very simple—no bearing adjustments required.
Pre-assembled, often with sensors and seals.
Less risk of installation errors.
Disadvantages:
The most expensive option per unit.
Must be a complete replacement; you cannot rebuild it.
Unit size may be larger, and packaging must allow for complete assembly.
Typical Uses:
This is found on nearly all modern vehicles, particularly for driven and non-driven wheels.
The automotive market prioritizes reducing installation errors and warranty claims.

Choose DFL NSAR for your hub and wheel bearings

Whether you need traditional tapered roller bearings or fully integrated bolt-on assemblies, DFL NSAR delivers the quality and consistency professionals trust.OEM-gradeprecision and rigorous durability testing. Custom sizes and materials are available to match your application. Fast global shipping from our US warehouse reduces lead times. Our team is dedicated to supporting automakers, dealers, and aftermarket service providers. From small trial orders to volume production, we ensure each bearing meets stringent international standards. Contact us today for a competitive quote.