Originally Posted by
Tourist in MSN
If it is a 1997, a trek of that age probably has a road triple. If it has a five arm 74mm BCD, you can put a 24T granny gear on it. You might lose a couple gears that have your smallest sprockets and smallest chainring, but those are cross chainged gears, should not use them anyway. If you lose them, the reason is that your rear derailleur might not be able to take up the slack.
Can you post a photo or a couple photos of your drive train and shifters?
I'll do that this evening or tomorrow when I am home.
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TroyM - bike riding, guitar playing, retired high school agriculture teacher and regular guy.