Assuming its a 1 1/8"
Cane Creek S3 or S8 - almost identical save for the fact that the S8 has stainless steel angular contact bearings. The S3 just has normal steel.
The contact bearings are easily changable (unlike Chris King ones where the whole cup assembly has to go back to CC to fit new bearings) , so you don't have to remove the cups from the frame.