[Es2] Old thread UrS4/S6 hubs vs S2

[Jimmy Pribble]

> The UrS6 hub is shorter than the S2.

I knew it!  I have long hated that I didn't do this myself when I had the
chance almost two years ago.  May I have permission to use that photo on my
site?  I would like to include it on the S2 hub page.  Anyway, as many of us
have concluded, this does change what brake options are available.  Check
the archives for relevant discussion.

Thanks Greg!

Jimmy