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Ultegra Front Derailleur

Old 07-06-06, 09:50 AM
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ronbridal
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Ultegra Front Derailleur

What's the difference between the Shimano 6500 or 6600 front derailleur. I know the 6600 is the 10 speed group and 6500 was still the 9 speed. Can I use the 6500 with a 10 speed drivetrain? I will need a brazeon and plan to use it on a Litespeed Firenze. Thanks!
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Old 07-06-06, 11:50 AM
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The Shimano web site has compatability charts under heading "Technical". I do not think the FD-6500 is compatable with the 10 speed. But look at the charts to be sure. Also be sure it is compatable with your front chainring( either double or triple)

Hope this helps

Brian
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Old 07-06-06, 01:09 PM
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I've read numerous times that there isn't really much difference between the front drive of Shimano 9 and 10 speeds. The cranks have the same spacing so I don't see where there would be any need for Shimano to change the derailleur. I think it would work just fine.

SB
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Old 07-06-06, 02:47 PM
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Originally Posted by tigerdriver
The Shimano web site has compatability charts under heading "Technical". I do not think the FD-6500 is compatable with the 10 speed. But look at the charts to be sure. Also be sure it is compatable with your front chainring( either double or triple)

Hope this helps

Brian
A front derailleur wouldn't have to be compatible with 10 speed. It is a front derailleur. A rear derailleur would need to have such compatibility. The practical difference between the two FD's is age and price.
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Old 07-06-06, 02:50 PM
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The spacing between the cage plates is narrower with the 6600. I had the hardest time getting my 9-speed double shifting just right until I took out the calipers and compared the spacing between a 9-speed FD on another bike and what I thought was another 9-speed FD but turned out to be 10-speed. The two derailers look nearly identical but a 10speed FD will not work 100% with a 9 speed chain. Not sure how well a 9-speed FD would work with a 10-speed chain though, probably better than the other way around.
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Old 07-06-06, 03:56 PM
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Yes, based on other forum reports the 9-speed front derailleur will work fine with a 10-speed crankset and/or 10-speed chain but the 10-speed front derailleur does not work well with 9-speed crankset and chain. This will be even more noticeable on triples due to the difference in middle chainring sizes.

Al
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Old 07-06-06, 08:15 PM
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If you are going with the 10 speed front derailleur then go with a 10 speed chain. The distance in between the plates on the chains are the same. The difference is the 10 speed are thinner plates so the outside distance is a little less to fit a little better in the 10 speed FD.
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Old 07-06-06, 09:08 PM
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ronbridal
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I will probably go ahead with the 9 speed front and see how it works. Everything else is 10 speed so it is all compatible. Thanks for all the help! RON
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Old 07-06-06, 10:35 PM
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i believe it is the width of the fd cage that is different
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