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Old 08-16-06, 12:08 AM   #1
soulsurfer
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Hi all

Im fairly new to this forum but have been reading here for the last month or so.
I have a question regarding component compatibility and was hoping that someone can point me in the right direction.

here is the basis framework - my wife currently rides a 2004 lemond Buenos Aires with an Ultegra rear derailleur 9 speed and a 105 double front derailleur. basically stock from factory.

I ride a 2006 Specialized Allez Sport with all Tiagra components except for the 105 rear derailleur. it came
with a 9 speed in the rear and a triple in the front.

I'm planning to get her an Ultegra front derailleur. 2/3 and 10 speed for her lemond. Will this work on her bike?

in addition, I like to take her 105 front derailleur and use it on my Specialized. will her front derailleur work on my bike?

if not, can you recommend another derailleur that would work?

thanks for the help.

JC
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Old 08-16-06, 02:26 AM   #2
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This is quite an expensive proposition for a nearly new bike. There is not much to be gained from 9 speed to 10 speed. But, that wasn't your question. Yes, you can make the conversion from 9 to 10 speed. You'll need new 10 speed shifters, 10 speed cassette, 10 speed rear derailleur, probably a new chain and new shifter cables. You will also need to buy the proper bike tools to do this upgarde. The front derailleur clamp diameter is specific to the seat tube diameter, assuming neither front derailleur is a braze-on, so you can only make the switch if the seat tube diameters are the same. On the up-side, now is a great time to buy mail order parts. The sales are great.
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Old 08-16-06, 06:36 AM   #3
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i dont think he wants a whole new drivetrain, if i am not mistaken. you can put an ultegra triple front mech on her bike, but A the 105 wont work with your triple, and B there are better places to blow money than on front mechs. if you ever look at weights, you'd know that there is hardly a diff between dura ace and tiagra, and every good mechanic knows that a tiagra shifts 94 percent as good as a dura ace. just keep that in mind. new shifters, although more expensive, have much more to do with shifting quality, as would better chainrings, if they arnt shimano.
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Old 08-16-06, 08:10 AM   #4
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soulsurfer, your post is a little confusing. I also read that you want to convert her Lemond to a 10-speed, if so you will need new 10-speed shifters, cassette, and chain. New shift cables and cable housings are included with new Shimano shifters.
The old 9-speed derailleurs will shift 10-speed. A double front derailleur will not work with a triple crank/chainring well. A triple front derailleur will shift a double crankset but not as well as a double derailleur. I don't understand what the "2/3 comment means. Maybe a bit more clarification will help.

Al
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Old 08-16-06, 08:17 AM   #5
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Quote:
Originally Posted by bluehair
This is quite an expensive proposition for a nearly new bike. There is not much to be gained from 9 speed to 10 speed. But, that wasn't your question. Yes, you can make the conversion from 9 to 10 speed. You'll need new 10 speed shifters, 10 speed cassette, 10 speed rear derailleur, probably a new chain and new shifter cables. You will also need to buy the proper bike tools to do this upgarde. The front derailleur clamp diameter is specific to the seat tube diameter, assuming neither front derailleur is a braze-on, so you can only make the switch if the seat tube diameters are the same. On the up-side, now is a great time to buy mail order parts. The sales are great.
I agree with the above. This is quite expensive. The Rear Derailluer you have should work as the travel from start to finish is very close from the 9 speed to the 10 speed and the Indexed shifter controls the distance anyway but other than that you will need all of the above to do this.
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Old 08-16-06, 08:53 AM   #6
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Hi All

Truth be told is that my front tiagra shifter/deraileur doesnt shift as crisp and clean as my wife's bike. So I figure that I can upgrade both bikes by adding an Ultegra derailleur for her bike and get the 105 front derailleur for my bike in order make the shifting as smooth as possible with little money invested.

Do I hear right that it is the shifter/brake itself that will make it shift smoother? That is an expensive part even if on sale. :-)

thanks all.
JC
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Old 08-16-06, 09:16 AM   #7
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Most shifter performance problems are related to derailleur adjustments and the condition of the shift cables, cable housings, and shifters. Upgrading the front derailleur may not help at all. For derailleur adjustments try the instructions at the Park Tool website: http://www.parktool.com/repair/byreg...ageField2.y=10. You can try lubricating the cables but it's about as easy to replace the cables and housings and the results will be better. As for shifters what I do is flush them out with WD40 and then drop in a little oilbase chainlub.

Al
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Old 08-16-06, 05:10 PM   #8
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thanks for the replies........to answer a few followup questions.....2/3 refering to double or triple front cranks and my bike is fairly new.....less than 3 months old.

its weird, I took it back to the shop where I got it from and they said that nothing is wrong with the front shifter/derailleur at all.

However, I know for a fact that it doesnt shift as crisp and clean as my wife's bike.

regards
JC
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Old 08-16-06, 05:32 PM   #9
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Quote:
Originally Posted by soulsurfer
thanks for the replies........to answer a few followup questions.....2/3 refering to double or triple front cranks and my bike is fairly new.....less than 3 months old.

its weird, I took it back to the shop where I got it from and they said that nothing is wrong with the front shifter/derailleur at all.

However, I know for a fact that it doesnt shift as crisp and clean as my wife's bike.

regards
JC
Your wife's bike is a double, yours is a triple, right? STI front shifting is a bit finicky and I haven't found it to work as well on triples as on doubles.
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