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Dura Ace shifters 105 Group


TEAM KOEKEMOER

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Not sure if the DA 7900 shifters will work with a 105 5600 RD.(maybe 5700) When 7900 was released I considered mixing the shifters with a 6600 rd and I was told that they were not comnpatible,by more than 1 lbs.

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Not sure if the DA 7900 shifters will work with a 105 5600 RD.(maybe 5700) When 7900 was released I considered mixing the shifters with a 6600 rd and I was told that they were not comnpatible,by more than 1 lbs.

 

 

Looks like you got conned by more than one LBS. Not only do they fix prices, but information too.

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They actually did me a favour. Went Campy instead from another lbs and haven't looked back....

Edited by caad4
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Not only do they fix prices, but information too.

 

dis-information, designed to con you into buying more crap at their inflated prices.

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the shifters vs rd/fd debate is frankly bollocks - i was running 105 10sp shifters with a shimano 600 (8 speed) rd and fd at one point - no probs. the reach is the same from 8sp to 10sp (just the cog spacing changes). the rd/fd have no influence on the indexing.

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Here is the chart they used at the time. Outdated, as 6700 and 5700 don't seem to be there, but shows 7900 stands on it's own..

 

http://www.shimano.com/publish/content/global_cycle/en/us/index/tech_support/tech_tips.download.-Par50lparsys-0025-downloadFile.html/01)%20Drivetrain%20Compatability%20Chart.pdf

 

Sorry, to edit, not only the bike shop lied, the manufacturer lied as well. How else will the sell "new" crap?

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the shifters vs rd/fd debate is frankly bollocks - i was running 105 10sp shifters with a shimano 600 (8 speed) rd and fd at one point - no probs. the reach is the same from 8sp to 10sp (just the cog spacing changes). the rd/fd have no influence on the indexing.

 

Not quite. The 8 speed Dura Ace RD only works with 8 speed and below DA shifters. Of course the RD has an influence on indexing. Its a parallelogram, so when you pull on the cable anchor point the pulleys move a corresponding amount that is determined by the geometry of that parallelogram. For this reason you cant mix Sram.Campag and Shimano. Likewise, you cant use a new 10 speed Shimano MTB RD witb 9 speed Shimano shifters.

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