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Shimano Ultegra RD-6700 Rear Derailleur $0.00
Wider links. That's the secret sauce for better, faster shifting at the rear derailleur for Shimano's Ultegra 6700 rear derailleur. Think about how wider things are better at resisting torsional load than narrower things. Same thing for the new Ultegra design. The shift plates are wider, connecting to the pivot and knuckle further apart, and thus better to resist flexing and twisting when you shift under load.
As always with Ultegra, this is a trickle-down design from Dura Ace. So, yes, it will work with 7900 shifters no problem. It will work with old Ultegra (6600 and SL) shifters no problem. The differences, however, are many. The obvious one is that the derailleur isn't as light. There's more metal and the pulley cage is made from composite plastic rather than carbon fiber. The pulleys are the same size as DA pulleys, but run on bushings, or in tech-speak, sleeve bearings. The cage design, along with the pulley cage placement, allows this derailleur to work with cogs as tall as 28 teeth, nice for those who want a really low low gear, and still a light derailleur and fast shifting.
The Ultegra rear derailleur is designed to work with 10-cog cassettes, though it will also work with nine-cog cassettes. The limit screws are on the back of the derailleur, just above the barrel-adjuster, and can be accessed from the rear.
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Community & Reviews
Not as Pretty but Just as Functional
I swapped out my Dura Ace Derailleur for this ultegra as I changed my cassette from a 12-25 to 11-28. Absolutely no change in performance. The only difference is 60 grams of weight added and not as good looking. Do you spend 3 times the cost to say you ride Dura Ace? Easy decision for me.
Hi I have Tiagra shifters and Tiagra rear...
Classic quality, classic Value
Straight ahead Ultegra. Best price on the internet- short cage seemed to work just fine with my compact double and ten speed casset.
I have a 9-speed with a Shimano 105 (5501)...
i want a more smooth shifting experience....
i want a more smooth shifting experience. i have the shimano 105 on it what would anyone recomend to put on instead
Moving up to Ultegra will make for smoother drivetrain/shifting but maintenance is the most important aspect of getting a smooth drivetrain-no matter how expensive the components are they must be properly (meaning regularly) cleaned/degreased and lubed. Installation/tweaking of the drivetrain is also a factor if you are installing yourself or having the LBS do it make sure you (or they) know what they are doing. A little patience in adjusting limit screws, etc. will be worthwhile in the long run.
how much better is this rear derailleur...
how much better is this rear derailleur compared to the shimano 105
Well think of it like this. There's not a HUGE difference BUT, would you rather drive a Lexus or a Toyota? Exactly. They both are cars. They both will get you from A to B, but the Lexus would make a nicer more comfortable ride.
I just wrapped my 2007 Ultegra rear...
This model will work fine. Its just a new model that looks a little different. It works just the same as the old model. Just make sure you get the long cage.
I need to replace a Shimano Ultegra RD-6600...
I need to replace a Shimano Ultegra RD-6600 ss (short cage) rear derailleur. Can I replace it with the RD-6700?
Smooth and Fast
This rear derailleur is super smooth and fast shifting up and down. It makes racing so easy being able to shift so quick and crisply.
how do i know if i need a long cage or...
how do i know if i need a long cage or short cage?
If you have two chain rings up front go Short-cage, if you have three (a triple) go with a Long-cage.
The above answer is correct for most setups, but to be absolutely sure calculate the "capacity" of your setup (difference between largest and smallest chainrings PLUS difference between largest and smallest rear cogs. Compare that number to the capacity of the rear derailleur - the capacity of the derailleur must be greater than the capacity of your setup. The 6700 GS has a capacity of 38T, the SS 33T. So if your chainrings are 50-39-30 and your cassette is 12/27 your capacity is 35T. The GS has enough chain wrap for this setup, the SS does not. You can get the derailleur capacity from the manufacturer or from tech support here at Jenson.
I have an FSA Gossimer crank (a double)....
I have an FSA Gossimer crank (a double). Will this be compatible with it? Also, I have 105 shifters. Will I have to change them? Thank you in advance.
Yes, that is a pretty common setup and will work fine for you.
Fantastic upgrade piece
Would this derailleur be compatible with...
Would this derailleur be compatible with a Fulcrum Torq RS crank (compact)?
I would Recommend using the 6600 or 7800 Chain and of corse Shimano Sti, Frt Der and Cass.