I started a thread last week asking about some current lightweight wheel options while doing some research. I came across an article about the importance of wheel rigidity. Enkei made two sets of wheels. One where the most weight was shaved off and just above the minimum threshold of rigidity. The other set made with rigidity was a priority. Result was a large difference in performance with the rigid wheel having a better time on a road course. We can all weigh wheels, but how do we determine rigidity?

Here's where I read it.