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2006 Trek 3900 - Specs, Reviews, Images - Mountain Bike Database
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BLUE TREK 3900 24 - SPEED FRONT SUSPENSION MOUNTAIN BIKE WITH FULL DISC BRAKES - Able Auctions
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2010 3900 - Bike Archive - Trek Bicycle
19.5" TREK 3900 Alpha Aluminum 21 Speed Hardtail Mountain Bike 5'9"-6'0"
Trek 3900 Mountain Bike
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2008 3900 WSD - Bike Archive - Trek Bicycle
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