Dura-Ace 7800 Rear Derailleur Tuning
Moderator: robbosmans
Has anybody tuned a Dura-Ace 7800 Rear Derailleur?
What savings could I expect if I went with a Fiber-Lyte Carbon, aftermarket pullies and a tuning kit?
What savings could I expect if I went with a Fiber-Lyte Carbon, aftermarket pullies and a tuning kit?
Though its in German, this thread http://www.forum.light-bikes.de/showthread.php?t=16208 gives a pretty good idea of the potential. I believe he got it down to 93g. Much more than just back plates and pulleys though.
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jdp211 wrote:Though its in German, this thread http://www.forum.light-bikes.de/showthread.php?t=16208" onclick="window.open(this.href);return false; gives a pretty good idea of the potential. I believe he got it down to 93g. Much more than just back plates and pulleys though.
Thanks J!
jdp211 wrote:I believe he got it down to 93g. Much more than just back plates and pulleys though.
Many photos here: http://www.forum.light-bikes.de/showthr ... 08&page=30
I think with just plates, pulleys, and a bolt kit you are looking at ~30g savings... or ~152g.
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Here is how I got my 182 gram short cage Dura Ace rear derailleur down to 145 grams...
Dura-Ace Rear Derailleur New In Box RD-7800SS short Cage
* Alloy hanger bolt
* Alloy cable clamp bolt
* Alloy plate Axle bolt
* Jagwire carbon Rocket cable adjuster
* KCNC Ceramic Bearing jockey wheels
* Alloy mech jockey bolts
* RS P carbon outer plate
* RS P carbon inner plate
* Titanium Spring
It's not as extreme as the one pictured above, but it was also much easier.
download/file.php?id=29216&mode=view
Dura-Ace Rear Derailleur New In Box RD-7800SS short Cage
* Alloy hanger bolt
* Alloy cable clamp bolt
* Alloy plate Axle bolt
* Jagwire carbon Rocket cable adjuster
* KCNC Ceramic Bearing jockey wheels
* Alloy mech jockey bolts
* RS P carbon outer plate
* RS P carbon inner plate
* Titanium Spring
It's not as extreme as the one pictured above, but it was also much easier.
download/file.php?id=29216&mode=view
xnavalav8r wrote:Here is how I got my 182 gram short cage Dura Ace rear derailleur down to 145 grams...
Dura-Ace Rear Derailleur New In Box RD-7800SS short Cage
* Alloy hanger bolt
* Alloy cable clamp bolt
* Alloy plate Axle bolt
* Jagwire carbon Rocket cable adjuster
* KCNC Ceramic Bearing jockey wheels
* Alloy mech jockey bolts
* RS P carbon outer plate
* RS P carbon inner plate
* Titanium Spring
It's not as extreme as the one pictured above, but it was also much easier.
download/file.php?id=29216&mode=view" onclick="window.open(this.href);return false;
Waoww, really decent shape and brutal condition, great job
rruff wrote:jdp211 wrote:I believe he got it down to 93g. Much more than just back plates and pulleys though.
Many photos here: http://www.forum.light-bikes.de/showthr ... 08&page=30" onclick="window.open(this.href);return false;
I think with just plates, pulleys, and a bolt kit you are looking at ~30g savings... or ~152g.
I'm going to be going with plates & jockey wheels
(though I'll feel safer with metal than carbon for the wheels).
I'll possibly be going with a bolt kit as well.
Does anybody have OEM weight for the jockey wheels and the plates?
(though I'll feel safer with metal than carbon for the wheels).
I'll possibly be going with a bolt kit as well.
Does anybody have OEM weight for the jockey wheels and the plates?
That German link to light bikes is fairly amazing. Just a beautiful job on the RD. Not so sure about the FD or the brakes. The thing I found funny was the amazing amount of work put into shaving 0.2g here and there on the RD and then hanging it on a bike with an Ultegra crank and with the steerer not cut down to length.
Talk about pennywise and pound foolish.
Talk about pennywise and pound foolish.
Hi there, greetings from Bandung, Indonesia.xnavalav8r wrote: ↑Wed Feb 15, 2012 3:33 pmHere is how I got my 182 gram short cage Dura Ace rear derailleur down to 145 grams...
Dura-Ace Rear Derailleur New In Box RD-7800SS short Cage
* Alloy hanger bolt
* Alloy cable clamp bolt
* Alloy plate Axle bolt
* Jagwire carbon Rocket cable adjuster
* KCNC Ceramic Bearing jockey wheels
* Alloy mech jockey bolts
* RS P carbon outer plate
* RS P carbon inner plate
* Titanium Spring
It's not as extreme as the one pictured above, but it was also much easier.
download/file.php?id=29216&mode=view" onclick="window.open(this.href);return false;
I really interested in modified my old Dura Ace 7400 rear derailleur, I think I'm going for "Shimergo" set up with 10 speed Campagnolo shifters.
@xnavalav8r Could you inform me where can I get all the WW spare parts for this particular rear derailleur? Sometimes the keywords in searching tab doesn't work.
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