This study examined the effect of different testing ergometers on V̇O2max, V̇O2max criteria achievement, and reliability of V̇O2max for V̇O2 plateau achievers and nonachievers. Twenty trained adolescents completed a treadmill, cycling, and rowing protocol twice. Of all subjects, 35%, 65%, and 45% did not achieve a plateau in either test (No P) during treadmill, cycling, and rowing, respectively. V̇O2max did not differ between tests for the total group or within the plateau and No P groups in any of the ergometers. A high reliability for V̇O2max was obtained in all ergometers. Our data suggest that Taylor’s criterion should not be a requisite for V̇O2max when testing trained adolescents.