Originally Posted by
armstrong101
OK everyone here is right. My bad.
I have a 1987 Bianchi catalog that refers to Shimano's "new" 105 group. So I thought that's when 105 was introduced.
Redesign of the components and the replacement of the bow and arrow with the numbers 105.
Was there an SIS version of 105 after the golden arrow stuff but before the 1987 105? Or was "new" 105 that [MENTION=369884]armstrong101[/MENTION] has in the Bianchi catalog actually from 85/86?
I know "Light Action" was 6 speed SIS in 1986- I would think those components sit lower than 105.