These original Cádomotus wheel axles will not damage your frame and lock itself due to the specific head design

• CNC-precision machined in 6061 aluminium
• M7x1 threaded (pay attention not to use these axles for non-Cádomotus frames that have M6 thread holes)
• Self locking chamfered head
• Fasten these with a 4mm hexicon or T25 inline tool