18 dog baby
Join Date: Jul 2004
Bikes: 2008 crosscheck complete, 1984 Pugeot fixed conversion
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Nope, your casette probably won't work on this wheelset. The altus group is for 9/8 speed systems, while the 2000 Trek 720 has a 7 speed casette. Sorry. I'm sure there's a way to make it work, if you use some spacers and what not, but I'm neither that intelligent nor mechanically inclined.
Maybe your local wrench can help you out.
But at any rate, since you're new to the forum, let me extend the obligatory NYCBikes warning: look out. Sometimes they suck.