Does anyone know a source where one could buy replacement headset bearing for Scott Foil frame? The upper one, which is 1-1/8, is easy to find, although it is usually sold as a pair. The lower one, which is specific to Foil, is 1-1/4, and I haven't found a place where it to buy it.
I'm willing to buy a whole WCS headset too, but I haven't seen it for sale too.

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Scott Foil Di2 2012
Scott Scale 35 2010

a bike shop

Doesn't each manufacturer/model have different headset bearing standards? It may be worth looking for this on your current bearings and sourcing bearings of the same standard

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My SwiftCarbon Ultravox

My Giant Defy Advanced

Yes, but that isn't the question. I know which bearings I need, but they just don't seem to be available. A regular "bike shop" doesn't know much about them, as the lower one is only specific to Foil. Even the whole headset is hard to find online, nor is it or the bearings available from www.ritchey.ch.
I e-mailed Ritchey about that, but maybe someone in the US knows better, after all, both Scott and Ritchey are based in US.

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Scott Foil Di2 2012
Scott Scale 35 2010

I bought one through a Scott dealer - they do this all day. Job done.

bearings or the whole headset?

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Scott Foil Di2 2012
Scott Scale 35 2010

any bike shop should be able to remove, measure and source the bearing, scott dealers almost certainly have them in stock. AFAIK they aren't really a proprietary bearing.

I have removed them and the measurements are laser etched on the bearings. Scott dealers have the whole headset - probably. If you could point me to a 46x34.1 and 45Dx45D bearing, the next beer is on me.

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Scott Foil Di2 2012
Scott Scale 35 2010

Doesn't quite match your measurements, but it is a 1 1/4", 45x45deg lower headset bearing. 46.8 x 34 x 7mm

http://webstore.fullspeedahead.com/fly. ... oreproduct