Porsche Wheel Fitment Guide: Size, Offset & Brake Clearance
Use this guide to check a proposed Porsche wheel setup before ordering. Start with the exact model, generation and fitted brakes, then compare the complete wheel and tyre specification. A wheel diameter or bolt pattern on its own does not establish fitment.
Identify the Porsche and its current setup
Record the model year, chassis generation, body style, brake package and any suspension changes. Distinguish Carrera, Turbo, GT3, GT3 RS, Cayman GT4 and other variants. Check whether your car uses conventional wheel bolts or a centre-lock system; these are different mounting arrangements.
Wheel fitment checklist
| Check | Why it matters |
|---|---|
| Diameter and width | Compare front and rear specifications separately. Confirm the tyre's permitted rim-width range. |
| Offset (ET) | Offset and width together determine how far the wheel sits towards the suspension and towards the bodywork. |
| Mounting system and centre bore | Match the vehicle's hub and the wheel manufacturer's application. Do not assume a wheel fits because it is advertised for Porsche. |
| Brake clearance | Check barrel and spoke clearance for the exact caliper and disc package, including any steel-brake or PCCB specification. |
| Tyres and load ratings | Confirm tyre size, load and speed requirements, and any vehicle-specific front/rear rolling-circumference requirements. |
| Fasteners and hardware | Use the specified seat type, length and mounting hardware. Follow the vehicle and wheel manufacturer's installation instructions. |
Compare the existing and proposed wheel
Read the markings on the current wheels and record the front and rear sizes. Our wheel fitment calculator can help compare dimensional changes. A calculation cannot check spoke shape, brake clearance, tyre deformation or clearance through suspension travel.
Use the wheel manufacturer's fitment sheet for the exact numerical specification. Where brake clearance is uncertain, obtain the relevant clearance template before ordering. Check clearance with the vehicle's actual suspension and tyre setup.
Find parts for your Porsche
- 996 GT3 and GT3 RS parts
- 997 GT3 parts and 997 GT3 RS parts
- 991 GT3, GT3 RS and GT2 RS parts
- 992 GT3 parts and 992 GT3 RS parts
- 981 Cayman GT4 parts, 718 GT4 parts and 718 GT4 RS parts
Browse APEX wheels or the wider performance wheel range, checking the selected variant's application. A model collection is a starting point, not a guarantee that every wheel variant fits every car.
Request a fitment check
Contact Nineteen72 Performance with the vehicle details, existing front/rear wheel sizes, tyre sizes, brake package, suspension changes and the proposed wheel link. Include whether you intend to use spacers. This gives us the information needed to check the proposed specification.