Is this 1989 Timberline the first GT Mountain Bike Ever? 24 HOUR FLIP! #BIKESYOUMUSTRIDE - YouTube
GT TIMBERLINE MOUNTAIN Bike, Totaly Original Condition. £82.00 - PicClick UK
1994 GT Timberline FS Mountain Bike Catalogue
Just got this GT Timberline (1994?) rideable again. Shifts better than a lot of bikes I've ridden! Old school rules 🤘🏻 : r/Hardtailgang
Another sub thought you all might like the GT Timberline I'm almost done fixing up. Details in comments. Didn't know about this sub before but loving your posts. : r/xbiking