Most fixed hub chainlines should be about 42mm ish to the centre, so that makes 18* left between the chainline and the over lock nut, given 120mm divided by 2 from your probable OLD. All this assumes you're wanting even undished wheel, as I guess you would with those hubs up there^. If you want to go 122/4mm to fit your frame better, make the hub flange to OL measurement more like 19 or 20mm.
Most fixed hub chainlines should be about 42mm ish to the centre, so that makes 18* left between the chainline and the over lock nut, given 120mm divided by 2 from your probable OLD. All this assumes you're wanting even undished wheel, as I guess you would with those hubs up there^. If you want to go 122/4mm to fit your frame better, make the hub flange to OL measurement more like 19 or 20mm.
Amiright?
*as someone said up there.