Underneath a Brompton....

[Schwinnsta]

By taking measurements mine is centered on the upper seat stays and out about 5-7 mm with the lower. So, yes your right. I never noticed that. So thanks for the education.

 

[Gunk]

Just checked mine and it is set towards the drive side of the triangle

 

[rogerzilla]

As long as it's in line with the seat tube. If it isn't, it won't be in line with the front wheel and that's not good.