Q.Brake Disk bore dimensions. Not 58.1 Are they 59.0?

[nico]

As above really, I just want to make doubly sure I have the correct diameter. As accurately as I can gauge, the hub widens a fraction of a mil, but this size on the bell MUST of course be exact, so any of you that happen to know (or have a micrmeter handy) your help is much appreciated.

I should have bought myself a micrometer before now. Been meaning too. am buying one off ebay later today!!

 

[Tom]

58.

 

[nico]

they can't be tom. if the centre bore for the wheels is 58.1, then the bit the brake disk sits on is fractionally bigger because there is a ridge. I measured the disk and as close as i can gauge it, it's nearer 58.5

Cheers for responding anyway. I'll find out for definate tomorrow when i ring technical

 

[Tom]

get yourself some calipers

They certainly look tight on the centre bore spigot.