[AJS]

I thought it was 53.?


Just looked it up in gregorys. it says 53mm

53 is correct.

 

[AJS]

54 is correct and there on ebay for $16 dollars.

No, it's 53. A 54 or 55 would work but if you want the correct size, it's 53.

 

[AJS]

The round nut that people are referring to is a much better system of securing your hub and will fit straight on, at little cost. You can also buy the tool to do it up with, though I made up one myself fairly easily.

 

[AJS]

I bought one but found it useless until the nuts where partly undone (using hammer and screw driver) as the socket was to big to get in far enough to get any purchase on the nut..

Yes, the inside of the hub is tapered towards the centre. I had to machine a taper onto the outside of the socket so it would fit in.