摘要:The bike is still one of the favorite mode of transportation as it is cheaper and environmentally friendly. However, some problems are still arise in current bicycle design, one of which is a discrepancy between dimensions of the bike with anthropometry of the user.This has resulted in unnetral and uncomfortable posture for the users.This study focuses on providing optimum configuration of distance from saddle to pedal, height of handle-bar, and distance from handle-bar to saddle of the bike. Some physiological parameters such as percentage of CVL (cardiovascular limit), energy consumption and Posture Evaluation index are measured to determine the optimum distance of handle-bar, distance from handle-bar to saddle, and distance from saddle to pedal. Results show that it is necessary to modify the current dimension of bike to accommodate three posture categories of Indonesia population: small posture (P5), medium (P50) and large posture (P95).