Dual Lock Nuts on Specialized Sirrus

WeeIan Posts: 2
edited July 2013 in The workshop
Sorry in advance if this is a daft question but...

I bought a second hand Specialized Sirrus recently and I got my first puncture. Had all the gear with me to change this but I hadn't noticed that the nuts on the wheels were different - apparently these are Dual Lock Nuts. Do I need a special tool to get these off or am I missing something?

Thanks in advance, feel a bit of a tool asking for help but struggling with this

Cheers, Ian.


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