So I'm in Washington, DC for Christmas and thought I might see if I can take advantage of the ruble-valued dollar. Anyone know if there are any bike shops in DC that sell TT kit - aero helmets in particular? I know there's a shop that has some TT bikes on some odd little side street in Georgetown... But I don't recall them having aero helmets. I also know there are fewer helmet types sold in the US because of CPSC regs and litigation, but I figured I'd give it a shot. And I've got an oddly-shaped head, so want to try them on in person rather than ordering online.

And entirely un-bike-related, anyone know if there are any running shops in DC that have a treadmill and staff trained to do a stride-analysis and recommend running shoes accordingly?

best chance would be the pro shop in georgetown... just call around.

Actually, right after writing that post, I walked over there and they did have the Giro. The American CSPC version is a bit too bulbous for my taste though.

Ask on the road racing forum. Several DC-area racers and TT types hang out there and may be able to help.

My usual shop, Capitol Hill Bikes, has had a couple Giro aero helmets along with a couple/few TT bikes and some clothing, aero bars, etc.