Track hub sizes
I am going to be order parts today to build my first wheel. It is going to be a rear track wheel and would like to do a Mavic Open Pro rim laced to a Surly track hub. I noticed they come in two different widths. My bike is currently spaced at 126mm (old Centurion Ironman). I am looking at the "new" Surly track hubs and they come in two sizes; 120mm and 130mm. Which of these hubs would be the best option?