[Dukedesmo]

If the wheelnut is anything like the older SSSA bikes (916 etc.) then it is likely to be a very thin nut that requires a lot of torque.

My 916 is like this and a standard 46mm socket has a rounded/bevelled edge to guide it on to the nut easier, trouble is the bevel is about half the width of the nut and so you get very little purchase onto the nut, meaning the socket easily slips and rounds off the edges of the nut.

I bought a standard 46mm socket and had this problem, so I got the end of the socket turned down so that it has a square edge and this is far better.

I don't know if you can find a 'square' edged socket, if so it's likely a Ducati specific tool with a Ducati specific price? ...