Trek 4100 alpha - bicycles - by owner - bike sale - craigslist
TREK 4100 Bicycle. Needs some work, probably rear wheel bearing. for Sale in Blawnox, PA - OfferUp
RLB Cycleworks - A nice 2004 Trek 4100 aluminum frame mountain bike with a 16” frame. Professionally serviced and ready to ride! A higher-end mountain bike with an semi-aggressive geometry with excellent