ABSTRACT: This study described bicycling (C-classes) and tricycling (T-classes) performance in International Cycling Federation road race events between 2011 and 2019. A total of 3,243 race results from 33 events were analyzed. Race velocity was calculated for each result. Bicycling and tricycling data were separately modelled using a linear mixed-effects model. Bicycling velocity was statistically different between all adjacent men's classes (Cohen's d = 0.14 to 0.73), and between the women's C1 and C2 (d = 1.15), and C3 and C4 (d = 0.48) classes. The absence of statistical differences between some women's bicycling classes may be due to a limited number of observations in these classifications. As expected, velocity was statistically different between men's (d = 1.64) and women's (d = 1.38) T1 and T2 classes. Road race performance was hierarchical within the disciplines of bicycling and tricycling, although not all adjacent women's bicycling classes were statistically different. The existence of a performance hierarchy does not necessarily validate the classification system. The integration of information regarding athlete impairment type and severity, with performance data, would provide greater insight into the validity of the classification system, and should be prioritized as an area of future research.