Wheel bearing and hub assembly product attributes

Wheel bearings cover everything from a pressed-in cartridge bearing to a complete bolt-on hub assembly with an integrated ABS encoder. Suppliers often describe all of them as a wheel bearing, which leaves a buyer unsure whether the part will bolt on or needs a hydraulic press. The generation of the design and the part type are the first facts a record needs to state clearly.

Physical fit then depends on details that application data rarely spells out: stud count and bolt circle, flange bolt count, pilot diameter, spline count and axle position. Drivetrain matters as well, since two-wheel and four-wheel-drive versions of the same truck often take different hubs. When any of these are missing, the part is only as reliable as the fitment table behind it.

ABS configuration is the most common source of wrong parts. A hub may carry a magnetic encoder with no sensor, an integrated sensor with a specific connector and cable length, or no ABS provision at all. Phrases like "with ABS" hide which of these the buyer is getting, so the record needs encoder type, sensor inclusion and connector details as separate structured fields.

The wheel bearings attribute template

18 candidate fields in 5 groups, ordered the way a record gets built: identify the item, capture its specifications, then record fit and the evidence behind any claim. 8 are marked Core: without them the item cannot be identified or filtered. Example values show the expected format only; they do not describe a real SKU.

Identity

Which exact item, variant and pack this record describes.

Check before use: Preserve leading zeros and punctuation, validate against the manufacturer record, and check the GTIN check digit and packaging level before linking.

Attribute	Type	Priority	Example format
Manufacturer Part Number (MPN) manufacturer_part_number_mpn	Identifier	Core	WB-590243
GTIN / UPC gtin_upc	Identifier	Channel / evidence	00812345590241

Technical specifications

Measured or rated values that must travel with their unit and test conditions.

Check before use: Store the number and unit separately. Convert only when the source unit and test conditions are known.

Attribute	Type	Priority	Example format
Bore Diameter (cartridge bearings) bore_diameter	Number · mm	Core	45 mm
Outside Diameter (cartridge bearings) outside_diameter	Number · mm	Core	84 mm
Bearing Width (cartridge bearings) bearing_width	Number · mm	Buyer decision	39 mm

Selection attributes

The type, material and option choices buyers filter and compare on.

Check before use: Map supplier wording to a governed vocabulary only after checking the source text and which variant it applies to.

Attribute	Type	Priority	Example format
Part Type (PCdb Terminology) part_terminology_pcdb_part_type	Controlled list	Core	Wheel Bearing and Hub Assembly
Bearing Generation bearing_generation	Controlled list	Core	Gen 3
Bearing Type bearing_type	Controlled list	Core	Double-row angular contact ball
ABS Encoder / Sensor Configuration abs_encoder_sensor_configuration	Controlled list	Buyer decision	Integrated magnetic encoder, sensor not included

Fit & compatibility

What the item mounts to, mates with, replaces or works alongside.

Check before use: Keep model and series qualifiers. A similar-looking part is not a verified fit until a source says so.

Attribute	Type	Priority	Example format
Vehicle Fitment (ACES) vehicle_fitment_aces_application	Text	Core	2015-2020 full-size pickup, 4WD, front
Position (Axle / Side) position_axle_side	Controlled list	Core	Front, left or right
Wheel Stud Quantity wheel_stud_quantity	Number	Buyer decision	6
Stud Bolt Circle Diameter stud_bolt_circle_diameter_pcd	Number · mm	Buyer decision	139.7 mm
Flange Bolt Hole Quantity flange_bolt_hole_quantity	Number	Buyer decision	4
Hub Pilot Diameter hub_pilot_diameter	Number · mm	Buyer decision	78.0 mm
Spline Count spline_quantity	Number	Buyer decision	29

Evidence & compliance

Listings, standards, classifications and origin claims that need a document behind them.

Check before use: Link the manufacturer document or label with its edition or date. Never copy a certification from a neighboring SKU.

Attribute	Type	Priority	Example format
Country of Origin country_of_origin	Controlled list	Channel / evidence	Germany
CA Prop 65 Warning prop_65_warning_required	Controlled list	Channel / evidence	Warning required

Normalize supplier values

The same value arrives in many spellings. Map each raw string to one governed value, and keep the raw text beside it so a reviewer can see what the supplier actually wrote.

Often missing from supplier files

These fields are commonly absent from price lists and basic feeds, even though the information usually exists in a datasheet, label or installation manual. Treat an empty value as a request for evidence, not as permission to fill it from a similar model.

• Axle nut torque specification
• Components included (nut, bolts, seal)
• ABS sensor cable length and connector type
• OE / interchange cross-reference numbers
• Spline count

Questions the record must answer

Buyers and counter-sales reps choosing wheel bearings ask questions like these. Each one needs a specific field, sourced for the exact variant.

• Is this the complete hub assembly, or just the bearing that has to be pressed in?
• Does it come with the ABS sensor, and does the plug match my harness?
• Is this the hub for the 4WD front or the 2WD front?
• What torque does the axle nut go back on at?

From supplier file to record

1. Resolve identity first. Link the supplier SKU, manufacturer part number and packaging identifiers without merging distinct variants or pack sizes.
2. Extract with the source attached. Pull values from rows, tables and datasheets, keeping the raw text, unit and page or row reference.
3. Map to your classification. Assign the ETIM, ECLASS, UNSPSC or internal class your company licenses, and keep the supplier's original terms.
4. Review, sync and watch. Hold conflicts and safety-related values for a category expert, write approved values to ERP or PIM, and recheck when the supplier sends a new file.

For the full method, see how to build a category attribute template and the category catalog gap audit.

FAQ