Knowing that lighter wheels can greatly help a car you would think riders (in search of more performance) would spend the money on them.
They're generally half the weight of stock wheels but around 2x-3x the price. I could be wrong, but they help more with handling than sheer speed (tune + full system would be more beneficial).
Only reason why I looked for one was because I wanted to swap between street and track tires...Ontario is great for flattening motorcycle tires.