Do you have a metric ruler? It is easy enough to measure the nuts across the
flats, flat to flat..
Most of the time it seems that they use a 13mm nut on the front and a 15mm
nut on the rear.
So if you got a set of cone wrenches you are in business, but a minimal set
of 13, 14, and 15mm wrenches covers most purposes.
Sometimes they get creative and use two different sized nuts, with the lock
nut being a different size.
But I bought the more or less full set from 13mm to 19mm, as you never know
what you might need it for.
"Bill" <[email protected]> wrote in message
news:[email protected]...
>I want to service the front hub on my bike, it's a 1999
> Campy Mirage. What size cone wrench do I need?
>
> Thanks.
>
>