There are many studies conducted on cognitive performance and of different aspects that can affect the performance. However, the literature review reveal that there is a knowledge gap in the area of measurements for bicycle stability and in how bicycle stability is affected during acute alcohol intoxication. The aim of this study is, therefore, to investigate if different group characteristics such as cycling experience, physical activity, sensation-seeking, or previous alcohol habits have an effect on bicycle performance or executive functions during acute alcohol intoxication. The method of the study was to measure stability while bicycling on a tread-mill and give participants doses of alcohol until a Breath alcohol concentration (BrAC) level of approximately 0.8‰ was reached. The results showed that cognitive performance was almost unaffected for the different groups studied. The results of bicycle stability were almost equal in effect of time among the four different group characteristics in both Roll and YAW measurements. Three of the group characteristics showed a main effect or a tendency for interaction effect of group by time. The conclusion is that the measure of Roll, the vertical orientation on a bicycle, maybe is the most effective stability measurement for bicycles.