Bicycle Mechanics - Dura-Ace 7402 & Campy Ergo 10
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02-20-09, 10:27 PM
I was thinking of running Campy Ergo 10 speed brifters with my (almost) otherwise DA 7402/03 shifting setup. While I know it should work theoretically, I wanted to hear from people who have actually tried it. I also wanted find out what chains and cogs seemed to work best with the mixed system. Check out my FrankenBike build at: http://roland733.spaces.live.com
Thanks in advance for any advice, feedback, or friendly heckling.
02-21-09, 07:51 AM
To make these shifters operate a 9 speed Shimano RD and shift to Shimano 9 spacing, you either need a shiftmate or the cobbled-up cable routing to lengthen the lever arm on the RD. The Campy shifters pull too much cable.
02-21-09, 08:13 AM
The 7400 series Dura Ace was 7-speed so it's not even compatible with other Shimano 8 and 9-speed components. I don't think there is a Shiftmate made to handle this unless the OP gets lucky or can do smoe innovative cable routing.
I'm successfully running Campy 10-speed Ergos with an otherwise Shimano 9-speed system and a Shiftmate but my rear derailleur is a 9-speed 105.
02-22-09, 12:26 AM
Some models of the 7402 rear derailleur are Dura-Ace 8 speed (marked "Integrated 8 SIS"), not 7 speed. I'm running a DA 8 speed system. And I already realise that it is not normally compatible with other Shimano 8 or 9 speed. However, as I have stated in my blog, I've successfully converted the 7402 rear D to now be compatible using a cable pull angle adapter. It is also old news that Campy 10 pulls almost the same amount of cable as 'regular' Shimano 8 (no Shiftmate required). Like my original posting says, I'm asking for feedback from people who have set up Campy 10 brifters with Shimano 8 derailleurs and cogset. Sorry for any misconception.
02-22-09, 08:50 AM
It's always wise to keep your post short and to the point. I don't want to read many pages of someone's blog to get details that can be summed up in a few sentences. FWIW, the average cable pull, per shift for a Campy 10 RD is 2.83mm, but none of the pulls are this amount. The first five are 2.5mm, the next two are 3mm and the last two are 3.5mm.
You might get better performance skipping the first two and using the last 7 pulls.
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