hi Pete,
I just tried to read what I wrote, If you understand that, we both have the same affliction..
I think to sum it up, I have a WM3, which is 80mm same as the hub centre, I initially made it central, but needed to pull it over to the left ~5mm.
If it were a WM2, that would make the rim in line with LHS of hub centre, not to say that's 'correct' but is what made mine centre in frame, and that's after having frame pro straightened(Dave Kellet and using drawings from service sheets).
Other thing to keep in mind is whether or not you have the
correct brake drum/chainwheel?
When I initially threw mine together with what ever I could find to 'fit', sure- 'fitted', but didn't necessarily 'fit' well.
Case in point, I used a brake drum/chainwheel with replaceable sprocket, that turned out to be from a A65 QD, didn't know better- no info available then- wrong gearing too, but the bearing housing/+spacer is different and threw the chain alignment/wheel offset out, plus slightly bent frame= Headf#$%^....
But I think I got it sorted- found a correct chainwheel-(and at the same time discovered one of the books has the brake plate spacer deleted).
Thing is I contacted SRM, and Gary replied,
Hello Dutch,
ok rear hub has zero offset , measured from end of hub on the spline side, ( do not measure from end of splines, simply just the end of the crinkly hub bit)
Assuming rim is standard WM2 steel rim.
Also do not assume wheels are central to forks front and plungers rear, note front wheel is not central in forks on A7/10 and A50/A65 up to 1970 !
Regards Gary
,
which didn't make sense to me so I used my own method- hope that's helpful?
Cheers, duTch