Been leaving my wheel covers off because the Gemini wheels look better on my MYLR. Usually I put the covers back on when I make a six hour drive to the beach but forgot last week until I was already on the road. To the best of my calculations, there seemed to be no difference in range. The weather may have played role in my calculations but charging one time each way as normal rendered the about the same amount of battery upon reaching my destination. Based on this I probably will leave the wheel covers off. My car was delivered in early Feb. so I continue to experience some range anxiety but after three trips to the beach I'm beginning to feel more comfortable.