The purpose of this study was base on Eccles's expectancy and value theory (Eccles et al., 1983) to examine high school students' bike expectancy and value beliefs. Method: Measurements of this research were expectancy and value beliefs Scale (Liao, 2007) and bike participant scale. One hundred seventy-one Participants completed the questionnaires. Age from15 to 18 years old (M=17.27, SD=0.58; male: 106, 62.0%; female: 65, 38.0%). Multiple regressions were used to analyze the expectancy and value beliefs of involved in bike. Results showed that significantly progress in scores of ability expectancy, required efforts, psychological cost of failure, expectancy cost from significant others, and task value in different involved. This data supported the concepts of bike riders' behaviors, and the validity of utilizing expectancy and value belief to describe psychological differences achievement behaviors.