I have 3 wheel sets for my Surly Steamroller....one with an SA 3 speed to help cope with the Schwalbe studded snows which drag a bit, and 2 single speeds, one with a 16 tooth sprocket and one with an 18. I can pop any of them on my 82 Holdsworth Special which ordinarily has a 5 sprocket, 2 chainring set up. All of them are cartridge bearing, except the SA hub, and apart from a bit of truing are maintenance free. Over the years I've found having multiple wheel sets very useful.