I found the perfect video to explain why there needs to be such a large difference in tire width.
Tire Load Sensitivity – Why Wide Tires Add Grip
Most mid-engine cars don’t have the extreme rear weight bias the TGS2 is saddled with and they still run the very different tire sizes. Heck, the Corvette is almost 50/50 and still has to run wider rears than fronts because of the added tire load caused by the high horsepower.
And that’s all I have to say because This Hit Me while I was in bed and I had to post it before I forgot it. My memory still hasn’t gotten any better. And my neck still hurts, but I had to do this.
Witch on a Bicycle 