I just bought my wife a used Giant Cypress DX, 2004 or so, and wanted to upgrade the tires. I'd like a good street tire, and what she has on now is a 700x41 with a standard valve. I'd like to go presta, and a narrower tire. Maybe a 700x32 to match my own commuter bike, or maybe a slightly larger 700x35? Just wondering what the rim will handle Do I need to stick with a 700x41?