Dura Ace 7402
03-24-10, 03:42 AM
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Dura Ace 7402
I was given a brand new 7402 derailer and am using it on a Exage Sport LX 7 speed shifter and I can not get it to shift clean from lowest to highest without a bunch of noise......is this a compatability issue? Do I need to find Dura Ace shifters for this upgrade? Also this is on Dura Ace hubs with a 12-21 cluster.
03-24-10, 04:02 AM
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That model number corresponds to years when Dura Ace had a different pull ratio to the rest of Shimano's products.
Here's a compatabliity chart.
You'll need to run it on friction, find a new derailleur, or find some DA 7 speed shifters.
I bought some once on Craigslist once, but they had been advertised as 8s and were broken.
Here's a compatabliity chart.
You'll need to run it on friction, find a new derailleur, or find some DA 7 speed shifters.
I bought some once on Craigslist once, but they had been advertised as 8s and were broken.
03-24-10, 07:01 AM
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It was on the page I posted, but opposite.
Originally Posted by sheldonbrown.com
If you need to use an older Dura-Ace shift lever with a newer rear derailer, there is an alternate cable routing that makes this compatible:
03-25-10, 03:18 PM
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One other possible option to add to Metzinger's list... Get some Shimano 9-speed shifters. These will shift the RD7400/7401/7402 at 8-speed spacing and that is so close to 7-speed that it will probably work. I'm doing this on my old roadie that was originally Dura-Ace 6-speed.
