Quicke release not done up properly... if your bike has horizontal dropouts, I would recommend an internal cam one, Shimano or Campagnolo type
This! I found the open cam type would slip in horizontal drops no matter how tight I got them. Had some embarassing falls in clips as a result.
@El_sabor started
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This! I found the open cam type would slip in horizontal drops no matter how tight I got them. Had some embarassing falls in clips as a result.