What is a Porsche chassis or generation code?

A Porsche generation code is Porsche's internal identifier for a specific platform generation. For example, the 992.1 refers to the first phase of the 8th-generation 911 (2019-2024), and the 991.2 refers to the second phase of the 7th-generation 911 (2017-2019). Enthusiasts use generation codes because they identify the exact platform beneath the car, which determines wheel fitment specs including offset, width, lug pattern, and whether the car uses lug bolts or centerlock hubs.

What is the difference between lug bolt and centerlock Porsche wheels?

Porsche uses two wheel mounting systems. Lug bolt setups are standard on most Carrera, Carrera S, and base Turbo models, using individual bolts to secure the wheel. Centerlock setups, found on GT3, GT3 RS, Turbo S, and select GTS configurations, use a single large central locking nut. The two systems require completely different wheel hub designs, which is why FMB Wheels publishes separate fitment guides for each mounting style.

What is the difference between a 992.1 and a 992.2 Porsche 911?

The 992.1 refers to the first phase of the 992-generation 911, produced from 2019 to 2024. The 992.2 is the mid-cycle refresh, introduced in 2024-2025, featuring updated styling, technology, and powertrain changes including hybrid options on some trims. Wheel fitment specs can differ between the two phases on certain trims, so it is important to confirm your specific model year and variant before ordering custom wheels.

Does FMB Wheels build custom forged wheels for every Porsche platform?

Yes. FMB Wheels builds custom forged monoblock wheels for virtually every Porsche platform, including the 911 across all generations, Boxster and Cayman, Cayenne, Macan, Panamera, and Taycan. While we have published fitment guides for the most popular platforms, we accept custom build requests for any Porsche chassis. Use the chassis lookup on this page to find your platform and request a guide or a build.