G’day from Oz.
A quick question:
The 100mm spacing referred to in the description of most hubs, relating to the spacing of the hub bearings (which are now 42x22x12 or similar) - is this centre to centre or inside edge to inside edge ?
i.e. is there a 100mm gap between the inside edges of the bearings, or 88mm ?
thanks
jd 
It is centre to centre. In all from outside of bearing to outside is 112mm, inside to inside is 88mm.
100mm Spacing ?
MANY thanks - exactly what I needed to know.
greatly appreciated
jd 