I have a 19'' front wheel and 18'' rear wheel on my sportster too. 19'' fronts are easy to find in either spoke or mag, no problem here. Here is a tip for CHEAP rear 18'' wheels: 1979-1981 sportsters had 16'' spoke, 16'' mag, 18'' spoke, or 18'' mag rear wheel options... AND they are disc brake wheels. They are a direct swap for all chain drive EVO Sportsters. To use them on a belt drive bike, you need to make some spacers, but its easy. Alternatively, buy a 1957-1981 OEM Sportster rear spoked wheel, take it apart, and lace the 18'' rim to your later model hub. The same old spokes will even work. These old 18'' spoked Ironhead wheels are cheap and easy to find at swap meets and on Ebay... it seems like the Harley guys want their fat 16''. From 1959-78, the 18'' and 19'' spoke wheels could come with optional ALUMINIUM rims. These look sweet, and are pretty light. Again, just take the old wheels apart, and lace then rims to our late model hubs, using the old original spokes. You're going to pay extra for the aluminium rims though, but still much cheaper than buying new Excel (or any brand) ones.