Joined: Nov 2006
Posts: 19,810
Likes: 597
From: NJ, NYC, LI
Bikes: 1940s Fothergill, 1959 Allegro Special, 1963? Claud Butler Olympic Sprint, Lambert 'Clubman', 1974 Fuji "the Ace", 1976 Holdsworth 650b conversion rando bike, 1983 Trek 720 tourer, 1984 Counterpoint Opus II, 1993 Basso Gap, 2010 Downtube 8h, and...
Easiest is to get a coaster brake hub sprocket, 21 or 22 teeth, from your LBS. I ordered one from either bikepartsusa.com or Niagara cycle works for like $2.50, plus shipping of course; not worth ordering it by itself, but if you need a few things, it can be worthwhile.