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AFAIK the chain line should still be the same as the 120 i.e. 42/42.5. Only the lock nuts/spacer is different between the two, hub shell remains the same.
So standard 109 I'll say.
As for 107 v 110 options, they make no difference. The 110 is isometric hence the DS axle are both the same length with the +3 on the NDS.
coventry_eagle
another swit fixie chainline question
this crankset: http://velobase.com/ViewComponent.aspx?ID=C02B4BBF-DF2A-42EE-8051-F1BFD771A72C&Enum=115&AbsPos=1
this hub: http://www.sturmey-archer.com/en/products/detail/hbt30-r-silver
(in 130mm OLN) screenshot attached
Frame is genesis flyer with forward facing dropouts.
What length BB do I need? Apart from 109mm because thats megabucks. 107 or 110?