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Old 10-25-06, 10:02 PM   #1
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Triple to Double

I want to convert a 9speed Ultegra Triple (2004) setup with a 10speed Ultegra double setup (2006) on my road bike.

Do I need to replace the shifters? Or just the crankset, FR derailleur, RR derailleur, cassette?

Thanks in advance.
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Old 10-25-06, 10:20 PM   #2
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probably the whole deal. to go to a double, the crankset is a no brainer, and it's probably a good idea to go with the double Front Der. For 10sp, you'll need a 10sp cassette (duh) and the rear der and shifters.
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Old 10-25-06, 11:55 PM   #3
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You don't need to change as many things as Brian says. Here's the rundown:
  • crankset (duh) to go from triple to double
  • cassette (duh) to go from 9- the 10-speed
  • bottom bracket (probably) to get crankset lined up properly; definitely if you're switching from Octalink BB to integrated crank/BB system
  • right (rear) shifter will need replacing, because you'll need a 10-speed indexed gear-shifting
  • left (front) shifter needn't be replaced; front shifter designed for triple will work fine with two stops; however, front shifter and possibly front derailler designed for narrower 10-speed chain may matter slightly. But if you do replace the right (rear) shifter, you may as well replace the left (front) as well, because the 10-speed Shimano brifters have noticeably different ergonomics than the 9-speed.
  • rear derailler - no need to change this. Shimano indexed rear deraillers all have the same cable-pull ratio, excluding pre-9-speed Dura-Ace. You could use a 105 rear derailler originally shipped with a 6-speed indexed group, and it'd work for you. That said, you may want to replace the long-cage rear derailler with a short-cage rear derailler, although the only differences are looks (short-cage appears more appropriate to a double) and slight weight savings.
Much better to just switch to double-crank 9-speed system; all you'll need to replace is your crank.
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Old 10-26-06, 12:08 AM   #4
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What's the point of this "upgrade"?
Stupidity got us into this mess - why can't it get us out?

- Will Rogers
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