CC Bexley Reliability Trial 2021. Reliability Trials are, like Audax events, not races, but rather long distance rides which emphasise fitness, self reliance and navigational skills - the difference being that Reliability Trials normally stipulate the completion of a given route (e.g. 100 miles) within a given time limit (e.g. 8 hours), whereas Audax is all about completing a route as close as possible to a set average speed. ...