This is a cycle pack which includes (bmx, bike, MTB). this mod will turn your old cycles into HD.
Note: It have a bug in house party cutscene when a homie comes to inform us in MTB. the texture of that MTB is damage. but it not a game crashing bug.
Copy and paste models folder into modloader folder (or import all six files into gta3.img).
All Credit goes to Muhammad Gibran