Parts for your 2018 Holden Commodore-Wheel studs nuts

2018 Holden Commodore and wheel studs and nuts: what’s actually fitted

For the 2018 Holden Commodore (ZB), wheel studs and separate wheel nuts are not used. Technical references including the Holden ZB Commodore Owner’s Manual (Wheels and Tyres section), GM Global Service Information procedures for wheel and tyre removal/installation, and the Opel Insignia B workshop literature that the ZB is based on all specify wheel bolts threaded directly into the hub. Those documents consistently call up “wheel bolts” and show them being torqued into the hub face, with no studs protruding from the hub and no separate wheel nuts listed.

Why’s that the case? The ZB Commodore was engineered in Europe (as Opel Insignia B), where hub designs commonly use threaded holes and wheel bolts. This hub-and-bolt setup suits European manufacturing standards and hub-centric wheel location. It also makes brake rotor changes straightforward because there aren’t fixed studs to work around, and allows a simple use of one locking wheel bolt if desired. It’s different from earlier Australian-built Commodores (VE/VF), which did use wheel studs with nuts.

What this means for servicing is simple: if a fastener is missing or damaged on a ZB Commodore, you’re looking for the correct OEM-spec wheel bolt rather than a stud or a nut. Always match the bolt seat style to the wheel (OE alloys typically use a specific ball-seat profile), and ensure the shank/length is correct so the bolt fully engages the hub threads without bottoming out. If a hub thread is damaged, the repair involves the hub (e.g., thread repair insert or hub replacement), not pressing in a new stud. When wheels have been off—for tyres, brakes, or suspension work—re-torque the bolts to the specification in the owner’s manual after a short drive, don’t rely on rattle guns, and don’t lubricate the threads unless the service literature explicitly says so. While aftermarket “stud conversion kits” exist for motorsport or convenience, they’re not an OEM fitment for the ZB and should only be considered with proper engineering advice, correct seating hardware, and adequate brake/ABS clearance checks.

• Factory fitment on 2018 ZB Commodore: wheel bolts into threaded hubs (no studs/nuts).
• Use the correct bolt seat profile and length for OE wheels.
• If threads are compromised, address the hub, there are no replaceable studs.

Technical sources referenced: Holden ZB Commodore Owner’s Manual (Wheels and Tyres), GM Global Service Information for ZB (Wheel and Tyre Removal/Installation procedures), Opel Insignia B Workshop Manual fastener specifications and diagrams. These all identify wheel bolts and do not specify wheel studs with nuts for ZB.

FAQ: Does the 2018 Holden Commodore use wheel nuts or wheel bolts?
It uses wheel bolts. The ZB’s hubs are threaded, so each wheel is secured by bolts that screw into the hub face. There are no protruding studs and no separate nuts in the factory setup.

FAQ: Can wheel studs and nuts be fitted to a ZB Commodore instead?
Aftermarket stud-conversion kits exist, mainly for motorsport, but they’re not OEM. If considering a conversion, get specialist advice on bolt pattern, seat style, bolt/stud quality, brake rotor clearance, and legal/insurance implications. For regular road use, the factory wheel-bolt system is the right choice.

FAQ: Any tips for maintaining or replacing the ZB’s wheel fasteners?
Stick with OEM-spec bolts (correct seat and length), clean the hub face and wheel mounting face, and torque the bolts with a calibrated wrench to the value in the owner’s manual. Re-check torque after a short drive. Avoid anti-seize or lubricants on threads unless the factory procedure calls for it.