![Trek 3900 XL Frame Aluminum Mountain Bike. Black/Gray - bicycles - by owner - bike sale - craigslist Trek 3900 XL Frame Aluminum Mountain Bike. Black/Gray - bicycles - by owner - bike sale - craigslist](https://images.craigslist.org/01616_1KbxifeKJy0_0CI0t2_600x450.jpg)
Trek 3900 XL Frame Aluminum Mountain Bike. Black/Gray - bicycles - by owner - bike sale - craigslist
![Trek 3900( Alpha Custom Aluminum ) Mountain Bike, 24Speeds. Size : 49.5cm Good Condition. for Sale in Plantation, FL - OfferUp Trek 3900( Alpha Custom Aluminum ) Mountain Bike, 24Speeds. Size : 49.5cm Good Condition. for Sale in Plantation, FL - OfferUp](https://images.offerup.com/3la4GJKDZdfC4qyHhduwqvust_Y=/756x1008/f84d/f84d74c6434b4b6585ceab5e5e582c42.jpg)
Trek 3900( Alpha Custom Aluminum ) Mountain Bike, 24Speeds. Size : 49.5cm Good Condition. for Sale in Plantation, FL - OfferUp
![Trek 3900 Alpha Mountain Bike - custom aluminum, 18" or 46cm size, new comfy seat for Sale in Seattle, WA - OfferUp Trek 3900 Alpha Mountain Bike - custom aluminum, 18" or 46cm size, new comfy seat for Sale in Seattle, WA - OfferUp](https://images.offerup.com/czjSVRn1oi3Bgj4Tj_z4VHakBdc=/1000x750/6448/64481306132f4d299d78f1766adf9a1e.jpg)
Trek 3900 Alpha Mountain Bike - custom aluminum, 18" or 46cm size, new comfy seat for Sale in Seattle, WA - OfferUp
![Trek 3900( Alpha Custom Aluminum ) Mountain Bike, 24Speeds. Size : 49.5cm Good Condition. for Sale in Plantation, FL - OfferUp Trek 3900( Alpha Custom Aluminum ) Mountain Bike, 24Speeds. Size : 49.5cm Good Condition. for Sale in Plantation, FL - OfferUp](https://images.offerup.com/CLYByOeVc_FJSVRkxhEMzX2KQ-Q=/1008x756/5489/5489b0ae012a44e8b37306ffae0ac041.jpg)