bike size

[baldy1926]

I'm after a cheap road bike and i've been looking at a raleigh 300 2009 model, evans have them in a 58cm size.
I'm 5ft 10 with a 31 inside leg by the way.
I understand they have a slighty different way of sizing. I will try and find a shop with one to try,but thought i would ask on here first.
thanks.