Sonny, there are two problems with that modification. The more serious one is that you wind up with a 1.85" rim in back that's a bit too narrow for any tire that fits the style you're trying for. Sure, you can mount a 110 or 120 tire, but its profile will be deformed by the narrow rim; probably not enough to be unsafe, but enough to compromise handling, and since you live in some of the world's finest riding country, you may not want that. Second, there's no magnesium in those "mags;" they're cast aluminum, and they're heavy. This is just one guy's opinion, but they're really kind of silly on a bike that's supposed to look like a flat tracker.