the Rial's dont really like the stock turbines. they are curved much more. some people had issues with the Rial's bending when hitting a pothole. if you want the OEM look, check out TSportline 19" TST . A LOT of us here are running on those. big threads here on TMC with lots of pics of them. They look exactly like the 21" turbines and much, much, much, much, much cheaper. They've been independently tested (great wheel), and made to OEM specs with a slight difference in offset and 0.5" wider. highly recommend the Tsportlines...
I have over 50,000 miles on my Rial's, and no problems. I bought them when my stock Cyclone bent, but that pothole would have bent anything. Yes, Tesla refuses to service anything about them, but they haven't needed anything.
I bought them over the TST's because I think the color and shape look better.
I have been complimented on my awesome looking TST's, but I had to reply that they are in fact Rial Lugano's and they are half the price
A quick note about Rials and Z-chains. If you find the need to put Z-chains on your Rials, the center mounted rubber tensioner will remove the finish from the wheel. Marred up both of my rears on a recent trip with chain controls.