I've finished the process of looking through every catalog for the twenty-seven year run of the Cannondale touring bicycle (1983-2009). I will be posting a document showing what models were produced each year, with a few notable oddities that I found.
Until then, these are the touring bicycles manufactured by Cannondale: ST400, ST500, ST600, T600 (1 year only/1992), ST700, T700, ST800, T800, T900 (1 year only/1997), ST1000, T1000, T2000, Touring 1, & Touring 2. Odd bikes are the TS700 & ST700 Silk Road from 98' and 99', and a quasi touring flat bar bike named the Adventure sold in 2001 (In 2002 the Adventure line exploded to include ten recreational bike models, none meant for touring purposes).
For two years there was only one touring model available (83',84')
For fourteen years there were two touring models per year available
For nine years there were three touring models per year available
For two years there were four touring models per year available (98',99')
At the top of the touring category were the following bicycles. In parenthesis are the number of years that they occupied that designation. This was not always concurrent. The T2000 was first seen in 1997, then disappeared until the year 2000.
ST500 (3 years) 83'-85'
ST800 (2 years) 86'-87'
ST1000 & T1000 (11 years) 88'-96', 98'-99'
T2000 (9 years) 97', 00'-07'
Touring 1 (2 years) 08'-09'