Buyer applications
Start with what the part must do on the vehicle. Then choose the evidence the buyer can review at sample and shipment.
For an alloy wheel line, state rim diameter and width, PCD, offset, center bore, brake clearance, wheel load rating and finish by SKU. An 18 × 8J sample can represent that size and revision. Ask the supplier which nearby widths and offsets a test report covers.
Compare steel rim width, bead seat, rim structure, corrosion finish, load rating and duty profile. For highway tires, record size, load index, speed rating, tread and destination. Example request: 225/45R18 95W, with actual application acceptance pending.
For an OTR inquiry, identify duty cycle, operating surface, carcass or ply rating, tread pattern, load, inflation guidance, heat exposure, quantity and port. Compare rolling resistance with wet grip and wear on equivalent sizes and test conditions before valuing either claim.
Share the OE cross reference and authorized vehicle details, hub flange dimensions, ABS encoder type or pole count, bearing bore / OD / width, preload and seal lip specification. For accessories, include thread, material, finish, pack and platform. An integrated hub can simplify installation on the right platform. A serviceable bearing can support a repair where the design permits it.
Mark the records ready for your supplier comparison. Use the same checkpoints on each bid.
During a proposed wheel sample check, seat the wheel on the agreed fixture and record radial and lateral runout at the specified bead-seat locations with a dial indicator. Log the fixture, sample ID, units and reading range so a second inspector can reproduce the measurement. Agree limits with the buyer before the check.
Describe the vehicle, duty and intended market. Name the parts you want to quote on a common basis.