Originally Posted by USAZorro
Has 531 tubing. My '78 has 700c. The '74 catalog also says 700c. I'm relatively certain they were 700c all through the 70's.
Early 70s Super Courses did come with 27" wheels--at least 1970-73, I believe. My '71 did (though I'm running 700c on it now), and a '73 I had did. I just looked at the pdf of the '74 catalog, and it doesn't say the tire/rim size, which leads me to believe it's 700c as it does specify 27" for models below the Super Course. Fwiw, I also have 27" wheels on my '71 Competition.
Neal