Have a wheel-end sourcing brief?
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Quick Spec

McGard specification checklist.

Organize the information needed to discuss wheel locks, spacers and related service parts.

Wheel-end specification review

Build the brief in four steps

01

Identify

Record vehicle, platform, model year and an OE number or VIN where available.

02

Measure

Identify PCD, center bore, thread and seat profile against a referenced drawing.

03

Define duty

Share load, operating conditions, clearance needs and the destination market.

04

Plan supply

Include quantity, delivery schedule, packaging and requested evidence.

Specification matrix

Locks and fasteners

Thread size and pitch, seat geometry, length, key requirements and wheel thickness are starting points. Confirm the required engagement and installation method with the assembly specification.

Spacers and adapters

Provide thickness, PCD, hub and wheel bore, offset, clearance and load. An adapter changes the interface and should be reviewed as a complete assembly.

Rings and weights

List both centering diameters and tolerance needs for rings; for balancing weights, describe the wheel surface, attachment method and service conditions.

Coordinate the review

Purchasing

Quantity, schedule and delivery location.

Engineering

Drawing, dimensions and revision.

Service

Installation and replacement context.

Quality

Evidence and target-market scope.

VehicleInterfaceDutyQuantity

Send your specification brief.

Even an incomplete brief is useful when the open questions are clearly marked.