So I bought a pair of DuraAce track nuts and turns out they're not the same thread, as Royce. Cliff from Royce said the thread is M10x1. Really don't want to spend £24 + £5.50p&p on a pair of Royce nuts.
No worries, DA nuts are pretty good looking, I'm sure I will find some use for them. Definitely rear and M10. Might get the ones mentioned by +Cranky or VeloSolo ones.
So I bought a pair of DuraAce track nuts and turns out they're not the same thread, as Royce. Cliff from Royce said the thread is M10x1. Really don't want to spend £24 + £5.50p&p on a pair of Royce nuts.