On Nov 3, 2009, at 3:23:27 PM, "Strickler, George M" <email@example.com> wrote: From: "Strickler, George M" <firstname.lastname@example.org> Subject: [CR] Dumb track bike question Date: November 3, 2009 3:23:27 PM GMT-05:00 To: email@example.com I never raced on a track. We didn't have one. I have now acquired a 70's era Frejus track bike which I'm building up. The chain is much beefier than road chains and the chain ring (Campy) has big teeth that are widely spaced. Is this all about stretch - providing a transmission that does not have any give in it? Or is there some other reason for the big chain and different chain ring?
George: Sounds like your Frejus has inch pitch drive system. I have a 1964 Paramount that I bought new and it is inch pitch.
I think Schwinn changed over to half inch 1966. Most track riders use 1/8" width chain. Most modern road bikes use 3/32"
width chain so they can fit all those sprockets and chain wheels in a smaller space. Goolge inch pitch and see what comes up.
Gene Diggs, Rochester Hills, Michigan (Home of the International Velodrome at Bloomer Park) firstname.lastname@example.org