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ENGINEERING BRIEF

SpokeGate Sourcing Specification Center

Use the checklist for fitment drawings, wheel loads and exact-part evidence before committing to a sample or production order.

Alloy wheel profile and inspection tools

Keep the drawing revision on every quote line

A visual match can suggest options. The purchase file needs the exact wheel revision, mounting conditions and supplier’s stated evidence to support a decision. Record tolerances and identify who accepts deviations before the quote becomes a purchase order.

DIMENSIONS AND LOAD

Three checks before a purchase decision

Mounting interface

Record center bore, fastener seat and PCD in millimeters. Separate hub-centric requirements from what the fastener arrangement supplies. A matching PCD leaves lateral clearance and fastener engagement open. A hub-centric design uses the hub pilot to locate the wheel. A lug-centric design relies on the fastener-seat geometry when the assembly is designed and installed for that method. Confirm the proposed seating and installation instructions with the candidate supplier. Record the lug seat and any backspacing shown on the drawing.

Packaging envelope

Use bead-seat width and diameter as named dimensions and record offset with its sign. Request the barrel and spoke profile where the brake package could interfere. Agree which drawing revision applies to the sample.

Duty and evidence

Set the wheel load per position using the vehicle and application requirements. Ask the supplier to identify the exact wheel, sample and test method. Check whether the report covers the finish or geometry offered if those differences matter to the buyer.

EXAMPLE CHECKLIST

Mark each document as it is reviewed

This example tracks document review. It does not report factory performance.

2 of 3Example: received and checked; awaiting axle approval.
1 of 3Example: received; size and exact part revision still open.
0 of 3Example: ask the factory to identify packing unit and named place.

SOURCE AND SCOPE

References for document review

SAE J2530 scopeFitment brief guideQuote normalization guide

The SAE scope page identifies a standard for aftermarket wheels for passenger cars and light trucks. Ask which version and procedures apply to the proposed wheel. A link to the standard gives a buyer context for asking for evidence. The exact-part report and the supplier’s declaration belong in the purchase file.

Ask for a wheel evidence checklist review

Share the mounting interface, duty and any report references you already have. We can use the open items to frame the supplier’s next response.

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