[Brumos RSR]

The leading cars do all have 13mm wide F1 rear hubs (although not all the cars with 13mm F1 rear hubs are at the front of the field).

Doesn't seem very GT3, but they are not breaking any rules for this series.

This rule was put in place 3 or 4 years ago after the first GT3 run.  F1 wheels were more common in the Group5 proxy which was replaced by the GT3 proxy. The wheels that have been used most often are 15x13 CBD wheels.  The JME wheels have been asked for but have not been made readily available which are 16X13. 


Rims - The minimum wheel size for front and back rims/wheels are 15mm as per the wheel manufacturer. Smaller (less than 15mm) e.g. F1 style rims are not allowed.