Originally Posted by
dashuaigeh
As long as the 8 speeds are ultegra and not DA (dunno if they even made 8 sp DA barcons) they should do fine with most Shimano RDs.
Yes, they did:
Shimano 8-speed bar-end shifters: SL-BS64-8.
Shimano Dura-Ace 8-speed bar-end shifters: SL-BS50-8.
Shimano 9-speed bar-end shifters: SL-BS77.