Join Date: Aug 2005
Location: Pittsburgh, PA
Bikes: '''96 Litespeed Catalyst, '05 Litespeed Firenze, '06 Litespeed Tuscany, '12 Surly Pacer, All are 3x8,9 or 10. It is hilly around here!
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It seems everything will work with one possible exception.
You didn't say what make and model crank you will be using. If it's a newer 9-speed design, the 8-speed chain may be a bit wide for it and may rub on some of the near cross chain combinations. BTW, a 9-speed chain will work fine with an 8-speed cassette if needed.
Otherwise, the 8-speed chain will work fine with the 8-speed cassette and SRAM makes good chains.
You can use the MTB front derailleur with the Ultegra barend shifters. All barends are friction front shifting and they are indifferent to what derailleur you have. The mis-match between MTB and road front derailleurs only occurs with index front shifting like STI.
Your rear derailleur will work with the Ultegra indexed barends but you must have the shifters match the cog number to use them in indexed mode. I.e. if you are going to use a 8-speed cassette, you must get 8-speed Ultegra bar ends.