Originally Posted by Schiek
So do I. Out of all the repeated questions around here--which are part of the game as far as I'm concerned--nobody since Merton has asked about where you can get a 75t chainring ... so you can go like 75mph on a fixie. Nobody.
http://www.ihpva.org/Builders/Sprocket/
Patterns for making up to 92t chainrings in any of several BCDs. You can make them from sheet aluminum with a punch, a drill press, a hacksaw and a file. Have fun.
peace,
sam