Orbit IS, probably. There's an 8mm upper bearing cap option with complete headsets, but I can't find it as a spare part at the moment. Cane Creek parts will probably fit too if they come from the same type of headset - it will be 36/45 or 45/45 - and they are even lower
Orbit IS, probably. There's an 8mm upper bearing cap option with complete headsets, but I can't find it as a spare part at the moment. Cane Creek parts will probably fit too if they come from the same type of headset - it will be 36/45 or 45/45 - and they are even lower
This slowtwitch thread has various suggestions