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Dura-ace 7402

Old 06-22-09, 07:38 PM
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Dura-ace 7402

Hello,

I realize that variations of this topic have been covered before, however, all of my searches have ended with conflicting results/opinions.

Question: I have an 8-speed Dura-Ace rd #7402 and I'm wondering whether I can successfully run DA 9-speed downtube shifters (SH-SL7700) on an 8-speed cassette? I realize that the cog spacing is slightly different, but does the alternate cable routing Sheldon described actually work well?

Or does it really just come down to getting a set of 8-speed DA shifters?

Any advice will be greatly appreciated!
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Old 06-22-09, 07:49 PM
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Just try it? Or does the answer to your question lead to you purchasing a part that may or may not be compatible.
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Old 06-22-09, 07:58 PM
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the b-route just allows proper cable actuation ratio between DA-7402 and the regular shimano cable pull ratio.

there's b for DA to regular, and then you can try b-routing for campy lever to shimano RD/cassette.
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Old 06-22-09, 08:00 PM
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Originally Posted by AEO View Post
the b-route just allows proper cable actuation ratio
You didn't read the page did you.
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Old 06-22-09, 08:19 PM
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well, if indexing, best to try it, if it's friction, why bother?
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Old 06-22-09, 08:36 PM
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According to Shimano it works. I think RobbieTunes may actually be using it. And I don't think it requires the alternate cable routing. If you look at the chart, ACR is for older DA shifter paired with a non-DA RD, not the other way around.
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Old 06-22-09, 10:26 PM
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you'll also find the alternative routing is nearly impossible with the DA Rear der. i've tried it. I ran mine on an 8sp cassette with 9sp shifters and it shifts great. i'm currently using the old DA with 9sp shifters and cassette with a shiftmate. I've been very satisfied with the results.
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