As much as I can see the overall width playing a role I think the width of the tires is a bigger concern. My example: I think I am going to run an MRRC Porsche 904GTS which is a very narrow car and is much narrower that the Fly 911 I was going to run. Even with the narrow width of the Porsche 904GTS I can still mount 10mm wide tires front and rear using a 3D chassis and CB Design wheels. I believe these wider wheels/tires on a narrow chassis will be the best of both worlds and be hard to beat.
We might want to take a look at the old Mille Miliga rules from 2012. The rules stated that the widest tire you could use was 9mm with either a 22mm or 20mm diameter. This alone could do a lot to level the performance. NSR make a selection of 8mm width tires that we could look at using for this series.
The rules for the 2012 Mille Miliga were very simple. I have them below for review.
