We explored the reliability (intra- and inter-sessions) of wearable technology to measure joint kinematics and kinetics. Intra-session reliability of joint angles was good to excellent, similarly to observations from optoelectronic systems, which provides confidence in using wearable technology for assessing joint angles in cyclists under very controlled exercise intensity. Differently, joint kinetics was more variable, in line with observations from pedal forces and EMG. Between sessions differences were larger, with the ankle angle presenting large variability. This last finding indicates caution when using wearable technology to assess effects from multiple-sessions interventions in cycling biomechanics, similarly to observed with EMG.