Trailer hitch + internal hub, the latter precluding quick releases or even wing nuts, is a nasty combo for removing a wheel for a flat fix. It would really help if I had a 15mm socket wrench I could stash in my saddle bag. It'd have to have a driver that would stick out along the axis of the axles to get around the trailer hitch. Something like this but for 15mm would probably do the trick if it were small enough. A small ratcheting driver might be a solution too. Any suggestions / links? Thanks!