Oh, dear! Just took a look at our Topos, which have about 2500 miles on them. I'm not sure, even with a magnifying glass, if I have very small hairline cracks in the front rim. It's very difficult to tell, because the edge of the decal also looks like a crack, but isn't. Rear wheel looks fine. Both hubs look good. Mark, you've made me nervous, so I think I'll stick with Spinergys for GTR.