Sizing up master cylinders

[millworm]

So I'm going pedal box on my nova, I don't want to buy a random generic setup. I want the right size masters for my brakes now I'm no total sure how this is done so I'd appreciate some help. I'm sure somone will probably know what size my 256mm brakes would use but my corsa c rear calipers may be a little harder to cater for. Cheers.

[Benn]

Std nova bore is 20mm iirc.

So if you want a bit better maybe 25mm?

[mk1nova_rich]

0.625 on front, 0.725 on back with rear discs although they will probably still want winding down a bit

[millworm]

Saved me a lot of grief! Cheers guys