How to use these guides
Start with the fitment brief when the vehicle application is known but the dimensions are incomplete. Use a single worksheet to capture rim diameter, width, offset, PCD, center bore and fastener seat. A diameter and bolt circle narrow the field, but the wheel still has to clear the mounting and brake package for the vehicle under review.
Open the quote comparison guide when you have supplier proposals. Review whether the factory included the required samples, tooling, packaging and freight. Use a separate line for any assumption your team must confirm. If a quoted variant changes the finish, packing quantity or named place, document the effect before comparing delivered totals. Pay particular attention to who arranges the sample inspection, whether the sample uses the production tool and what the factory will do if the approved finish cannot be supplied.
Engineering, quality and procurement may need to review different parts of the same offer. Let the fitment reviewer check drawings and brake envelopes, ask the quality reviewer to link test evidence to a part and revision, and have the buyer confirm currency, validity and quoted quantity. Write down which checks must be complete before your team awards an order.
The Specification Center has checkpoints for exact-part evidence. Use the purchase brief to ask about an application, a missing quote line or a sourcing project with several wheel sizes.