Originally Posted by
Dan333SP
I found a video and it does look like OP's bike has pretty standard upper/lower angular contact headset bearings-
Don't see any reason why he can't just get their dimensions and order replacements from a 3rd party.
Because those older Roubaix uses proprietary 1 3/8 inch bottom bearings that are very hard to source. You cannot just get the same diameter, you also have to get the angle right. Nowadays I stay clear of any frame with proprietary seatpost or headsets. Good luck finding parts on those future-shock 1.0 headsets when they are on future-shock 5.0 few years down the road.