Bike Anti-Porn - When Things Go Wrong

No, and the only Omniums (Omnia?) in our family are 80 miles away so I can't take measurements. In round figures, though, the spider is effectively 155mm diameter and aligned about 34mm off the centreline of the bike (41mm chainline less half the ring thickness and the spider thickness), which is conveniently also where the outside face of the BB shell lies, so if you can place a straight edge across the BB shell face and it doesn't hit the chainstay out to about 80mm behind the BB axis, you have a chance.

Just measured by this maths no chance at all of fitting. Does any one know of any one riding omniums who I could ask to get an accurate measure. I want to be sure they won't work before buying something else. Also I won't be crimping my chainstays before any one suggests it