FITMENT & ENGINEERING

Fitment comes before styling.

Share the vehicle, brakes, tyres, load and target stance before the production drawing is approved.

Fitment first

Geometry decides whether the wheel works.

Two wheels can share a diameter and PCD but differ in brake, hub, suspension, tyre or body clearance.

If an input is unknown, mark it for follow-up. Do not guess it into the drawing.

Engineering brief

Modified vehicles may also need section drawings, suspension notes and physical measurements.

Year, make, model, trim, drivetrain and intended use.

Diameter, width, square or staggered set-up.

PCD, centre bore, lug seat and hardware.

Target offset / backspacing and body clearance.

Caliper make, part number or clearance template.

Target sizes, sidewall and operating pressure inputs.

Vehicle / axle data and buyer-agreed wheel load target.

Stock or modified ride height and components.

Spoke direction, concavity, lip depth and styling references.

Destination countries and required validation / documents.

Drawing approval

Confirm the construction, dimensions, wheel section, design surface, markings and test plan before sampling.

V0
Input review
Resolve missing or conflicting vehicle and order data.
V1
Engineering proposal
Review the section, fitment, styling and constraints.
V2
Buyer approval
Freeze the drawing used for the sample.
GS
Golden sample
Record physical approval and agreed changes.