a 205 is not a small tire for a 2000 lb car with driver...

stock 2011 Lotus Exige tire sizes...

195/50-16 (Front)
225/45-17 (Rear)

It is about the closest "production" car to a 818 in size and performance

the new 2013 Lotus Exige S is heavier... still only 205's in the front

http://www.leftlanenews.com/new-car-...pecifications/

How about a new Miata... a bit heavier...

205/50-16

I'm expecting to try 205 in the front and 225 -235 in the rear on my 818

it's all about balancing the grip levels and there is less weight on the fronts