I put the 32mm Gatorskins on my Onyx this weekend and had a chance to try them out on Monday. Noticed some loss of grip around a traffic circle, no doubt exacerbated by riding over a manhole. I pumped them well below the max pressure, just a tad over the 15% drop chart, so I don't think I overinflated the rear. Upside is that they are noticeably faster than the 37mm Contacts on flat surfaces. Thinking about trying out 28mm GP 4000s II, maybe the reflex ones. Planet Cyclery has them for $37.95, which seems like an OK price. But would I be going in the wrong direction, tire width-wise?