I don't recall the Nut size. But, it's not hard to remove after you release the safety lock.
I forget if it's a pin or metal crimp holding the nut, but I think you can use an
adjustable wrench to remove the nut. I do own a large metric set, so I might have used one of my sockets.. That was years ago..
When you put it back on, make sure to get back the way it was..
The safety lock should go back on the way it was before removal..
Don't lower the jack without that little shaft and nut installed!!
(Not sure, but I think something bad could happen).
And be sure not to let anyone drive it either..
Here's what holds the wheel on..
Here in MA, I think they use an Ice-Melt stuff on the roads that is also a Honda-Melt product..
I edited the above post. Added a note about a bolt that needs to be removed before lifting the wheel mount, with a second jack..
It's been so long, (and I was on my way to work this AM) I just forgot the one important step!
You should use great care removing those bolts! Soak them in break-free stuff over night..
A light impact ratchet might be better than applying slow pressure with a socket wrench.. (The way I broke one)!