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When using my Direto XR trainer, whenever I go to sprint, accelerate, or apply high torque (such as when trying to climb), the trainer seems to release all resistance with a loud "clunk" and the bike pedals spin freely for a short time. The resistance returns as my reaction is always to stop pedaling immediately. I am trying to figure out what the issue is but thought someone might have experienced this and can get me right to the root cause and fix. My trainer is 3 years old, so perhaps it could be the belt is slipping and needs to be adjusted? Or even replaced (hopefully not)?

Kevin

same thing happens to me. did you ever figure out what it was?