http://i42.tinypic.com/2ueics9.jpg
OK.. pic of this rear.. in a collage. Suggest not reading anything into the camera angles.. it's as square as I can tell by eye or caliper.
Had a 127.5 spacing sitting here via this hub.. in the pic link shown mounting in the rear.
My data input into MACHINE HEAD software.. per a near symmetrical rear:
http://i43.tinypic.com/1osqwk.jpg NOTE.. the tension L to R shows the NDS higher
than the DS.. this due I suspect per 130 spacing wired into the software program... vs the 127.5 I used for this scenario.
I'll set the OC 6 speed setup at 123.5 width.. giving near the same result as shown via Machine Head. Only a 6'er.. I thought I'd need more until I tried that set out last summer.. really nice for 'silver hairs'.. 14-15-17-20-24-28 is going on. Last summer a 42/26 got my 1/4+ mile hill done-- around a 16% grade overall..
. Considering a 44-46/34 compact...