2000 Mongoose Pro DX 10.9 3Al/2.5V Titanium ,Butted TIG-welded FrameExcellent condition titanium frame with no dents or dings just some cable rub and minor chain suck. Specs:Top tube c-to-c = 21"Seat tube c-to-top = 16"Head tube length = 4 1/4" Frame accepts 26 inch wheels, 1 1/8th headset and 27.2 seatpost.