Andy

Bad wheel bearing maybe, if it's not wheel balance. If your wheels are out of balance, usually when you get to speed, you'll feel the steering wheel shimmy in your hands. I'd double check all the nuts and bolt on the suspension as well, make sure everything is torqued properly.

I noticed one night when I hit a bump my hybrids front suspension would clunk, like it was bottoming out or something. I went straight home and put the front on jackstands. When I took the front drivers side wheel off, the brake caliper almost fell out. I had just installed a set of GS-R front brakes (complete front spindles) and aparently whoever had them before me didn't use the old Honda bolts to attach caliper bracket when they changed their rotors, or at least didnt' torque them. One was missing, the other wasn't even finger tight. I pulled my CX's bolt off and torqued them to 80 ft/lbs and it was fine but that was freaky.