Mine are both on 17's, but I was going to go one size lower for the winters - 215/45/17 for summer, and 205/55/16 for winter, but couldn't get a set of 16" rims for a low enough price, so in the end I just went for an identical set of 17's, just a scabby set to keep the cost down. Shame, because the RX300 'Harrier' had a set of 16's that weren't too dissimilar to my standard 17's, which look really good. but most sets I found were £300 +

In the summer I might try sanding them down and painting them, just to make them look a little nicer