Australian Stud Pattern & PCD Master Hub
Quick answer
PCD means pitch circle diameter. It describes how many wheel studs or bolts a vehicle uses and the diameter of the circle they sit on, such as 5x114.3, 5x120, 6x139.7 or 5x112. A wheel must match the vehicle's stud pattern, centre bore, offset, load rating and brake clearance before it is safe to fit.
For Adelaide drivers, PCD is only the first fitment check. The right wheel also depends on tyre size, guard clearance, suspension setup, brake package, wheel nut seat type and legal road use.
How to read a stud pattern
| Example | What it means | Common use case |
|---|---|---|
| 5x100 | 5 studs on a 100 mm pitch circle | Some Subaru, Toyota and Volkswagen applications |
| 5x112 | 5 studs on a 112 mm pitch circle | Many Audi, Mercedes-Benz and Volkswagen applications |
| 5x114.3 | 5 studs on a 114.3 mm pitch circle | Common across many Japanese and Korean passenger cars |
| 5x120 | 5 studs on a 120 mm pitch circle | Common on many BMW and some Holden Commodore applications |
| 6x139.7 | 6 studs on a 139.7 mm pitch circle | Common on many 4WDs and utes |
These examples are starting points only. Always confirm the exact vehicle, year, model grade and hub details before ordering wheels.
PCD is not the whole fitment
Two wheels can share the same PCD and still be wrong for the car. Check:
- centre bore and whether hub-centric rings are needed
- offset and inner clearance
- wheel width and tyre size
- brake caliper clearance
- wheel load rating
- nut or bolt seat type
- guard clearance at full lock and suspension travel
- TPMS and valve requirements
Common Australian fitment conversations
| Vehicle type | Common fitment issue | Workshop check |
|---|---|---|
| Dual-cab utes | Load rating, brake clearance and tyre diameter | Confirm wheel and tyre package suits towing and touring |
| SUVs | Offset, tyre load rating and rolling diameter | Keep speedometer and clearance sensible |
| European cars | Centre bore, bolt seat and brake clearance | Match wheel bolts and hub fitment correctly |
| JDM and performance cars | Width, offset, guard clearance and alignment | Test fit before committing to aggressive sizing |
Why this matters in South Australia
Incorrect wheel fitment can cause vibration, rubbing, poor steering feel, wheel bearing stress or unsafe wheel fastening. It can also create insurance and roadworthiness problems if the wheel and tyre package is outside legal limits.
If you are choosing Rays, BBS, SSR, Advan or other aftermarket wheels, the safest process is to match the wheel to the exact car first, then choose tyres that keep the package usable on Adelaide roads.
Links for tyre and wheel planning
Useful starting points include wheels Adelaide, tyres Adelaide, wheel alignment Adelaide, and the Ford Ranger tyre size guide.
Local tyre help in Adelaide
Autosport Tyre World / TYREPLUS can help with tyre selection, wheel fitment checks, balancing and wheel alignment across Magill, Clarence Gardens and Wingfield.
TYREPLUS Magill | Autosport Tyre World Magill
647 Magill Road, Magill SA 5072
Phone: 0452 641 023
TYREPLUS Clarence Gardens | Autosport Tyre World Clarence Gardens
911 South Road, Clarence Gardens SA 5039
Phone: 0420 299 911
TYREPLUS Wingfield | Autosport Tyre World Wingfield
411 Grand Junction Road, Wingfield SA 5013
Phone: 0433 645 411
FAQ
What does PCD mean on wheels?
PCD means pitch circle diameter. It tells you the stud count and the diameter of the circle the studs sit on.
Can I fit wheels with the wrong PCD?
No. The wheel must match the vehicle's stud pattern. Redrilling, wobble hardware or unsafe adaptation should not be treated as a normal road-car solution.
Is 5x114.3 the same as 5x115?
No. They are different measurements. Some people discuss them online as close, but wheel fitment should be matched correctly.
What else matters besides PCD?
Centre bore, offset, width, brake clearance, load rating, nut or bolt seat type, tyre size and legal road use all matter.
Should I test fit aftermarket wheels?
Yes. Test fitting is strongly recommended, especially on performance cars, lowered cars, 4WDs, brake-upgraded cars and staggered setups.
Final thoughts
PCD gets you into the right fitment conversation, but it does not finish the job. Confirm the exact vehicle details, wheel specs, tyre size and clearance before ordering.