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Start with the catalog when you know the category and need a place to attach the OE reference.
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The NTN Wheel-End Buying Guide
Prepare a repeatable RFQ for a front wheel hub assembly, bearing kit or replacement wheel-end part.
Submit a sourcing brief
Start with the brief when a drawing, a vehicle list or a sample already identifies the request.
Start an RFQBuild a four-line sourcing brief
Identify the application
Record OE cross reference, vehicle year and derivative, driven or non-driven axle, and left or right fitment where applicable. Ask the seller to identify its reference source.
Describe the interface
Enter hub flange diameter and bolt pattern, spline details, ABS encoder ring type and pole count where specified. For a kit add bearing bore, OD, width and seal lip details.
Choose the supply route
Compare replenishment and custom offers on the same pack and drawing. A stock offer needs lot confirmation. A custom offer needs written sample, MOQ and tooling terms.
Agree the release record
Set the sample ID, drawing revision, datum and gauge resolution before measuring in mm. Record the inspection result, buyer disposition and the named Incoterm place on the quote.
Check the assumptions in the quote
Compare flange and sensor fitment, labor and installed scope. An integrated unit can simplify the assembly step. A bearing kit can reuse a serviceable hub where the platform permits it. Quote the tools, seals and fasteners needed for each route.
Ask both suppliers for their drawing revision, bore and flange dimensions in mm, mounting pattern and ABS encoder type. List unresolved differences line by line and confirm the sample route before approving a substitute.
Identify the sample and its drawing revision. Ask the inspector to document the hub locating datum, fixture, gauge resolution, measurement point and full rotation readings. Compare recorded values against the buyer-approved radial and lateral runout limits.
A wheel brief needs PCD, offset, center bore, rim size, load rating, finish and vehicle. A tire brief needs size, load index, speed rating, duty cycle, tread, quantity and destination. For either, ask which model and market each product document covers.
Separate the product price from the handling and freight scope. Ask each supplier to name the Incoterm place or port, and compare the costs and responsibilities at a common handoff point before ranking offers.