2010 Jamis Xenith SL Headset?

[intence]

Can anyone tell me what headsets are compatible with this frames? It looks like there might be a Ritchey and FSA model that might fit, but if anyone knows the bearing sizes, or which models would definitely fit, it would greatly be appreciated ... Thanks!

[BicyclePhD]

41.8x30.5 45x45

[intence]

Is that for the top bearing? Do you know if there's a standard off-the-shelf product that fits?

[BicyclePhD]

Yes it is the top bearing. Ritchey Logic Zero WCS drop in 1-1/8” 41.8 Campy

[intence]

Do I need something special for the bottom bearing, or is there a standard for a 1.5" oversized?

Any idea if the following would fit: FSA No44E (since it has both the top and bottom).

Or is there a Ritchey setup including both bearings?

[BicyclePhD]

if you have a 2010the lower bearing is 52x40 with a 45x90 the FSA is a 45x45

[intence]

Thanks, it's a 2010. I'll try and find the lower. The upper seems easy enough with the WCS.