Awfully modern seeing as how it has disc brake mounts.
They had some Zaskars with disc mounts and bosses back around 2000 - 2001.
Originally Posted by Shayne
Avalanche circa 2010 would be a good starting point for research. Search for old GT catalogues online.
Bikepedia has a pretty good pic of the 2010 Avalanches. The dropouts look different than a 2010 Avalanche 3.0, and the 2010 Avalanche 3.0 has a brace between the stays back near the dropout which his frame does not. The rest of the 2010 Avalanches are disc only models with no rim brake bosses on them.