[FrenchToast]

Not sure what the reasoning is, but it isn't a great idea unless you have the tools to do it.

The factory rarely used centerlocks on a spindle setup. I think the applications are limited to the RSR, 934, and 968 TRS. It's a pretty goofy setup. They switched to a live bearing on the 934.5 and 935, and of course, later cars like the 964 and 993.

With centerlock adapters you're adding extra loads to the already weak cast aluminum hub design.

As for the centerlocks on modern GT street cars, no, those aren't good. They never were a motorsport application, just marketing garbage. The thread direction is even the same on both sides.

That said, the motorsport 996 and 997 centerlocks (not on streetcars) are beginning to fail now. They have complex spring loaded keys to prevent the nut from flying off. Because of the complexity and tolerances, the entire assembly must be completely disassembled and inspected fairly regularly. Lesser maintenance and the parts bind up.

The older style motorsport ones that have a pin to prevent the nut from backing off probably require the least maintenance. But since it takes a while to remove and install the pin properly, they don't allow quick wheel changes.