The 1999 Diamond Back Venom XX features full CR-MO frame with large gusset between the top, head and down tubes. The down tube also features a straight section at the head tube before bending down. CR-MO fork with 1 1/4" blades and peg mounts. CR-MO 8" rise chrome handlebar. SST Rotor.
Top Tube Size
Made in Taiwan.
Fourth letter in the serial indicates year of production (1998 or 1999). X in the serial indicates production Month (E to L - May to Dec). Y in the serial indicates production Month (A to D - Jan to April).
Bikes made in Taiwan usually had an 8 month production and shipping timeline before they were sold in bike shops around the world. In May of any year, factories would usually switch production to making models for the following year.