SR3 Hub to upright nut.

[Matt Graham]

Experts,

Can anyone tell me the size of the very large nut that threads onto the portion of the hub that gets pressed through the bearing on an SR3 (i.e. the portion of the hub opposite where the wheel nut goes, or more specifically, the nut that must be removed to replace the wheel bearing in an SR3 upright).

Thanks!

-Matt