The Diamondback Centurion Interval is
a late 1980s to early 1990s road bicycle designed by Centurion, featuring a Tange Infinity chromoly steel frame, 14 speed Shimano Exage 500EX groupset, and sometimes BioPace chainrings. Known
A durable, budget-friendly vintage commuter, it often features 700x25c tires and 14 speed drivetrain.
Frame: Tange Infinity CrMo (Chromoly) steel, noted for durability.
Components: Shimano Exage 500EX, with Biopace chainrings.