mzeffex 

Which is better? Can get Dura Ace for less. Cranks only, not the group.

ls01

D/A should be lighter and have a better, more refined finish, operationally should be about the same. But if you can get D/A for less buy it I wouldnt hesitate.

FlashBazbo

I've owned both. With the 6700 derailleur / shifters, the 6700 crankset shifts much better than the 7800 crankset using 7800 components. It's a clear difference -- the best thing about 6700. But it may not be as noticeable if you're mixing and matching components.

7800 front shifting is very good. 6700 front shifting is significantly better.

mzeffex 

I guess more from a stiffness/weight view, since my other components are 105 and 6600

garysol1 

Better as in stiffer....lighter......? I don't know the answer but my guess is you wont notice the difference either way but I do think the 7800 looks better.

mzeffex 

Anyone else?

garysol1 

Take a look at this....may help.

https://www.rouesartisanales.over-blo...-30390346.html

531Aussie

I'm not sure about the 6700s, but the previous model Ultegra has a thicker axle wall (the end caps aren't interchaneable with DA), and is 'meant' to have more alu in the arms. So, as a bike shop guy once said to me: "Ultegra cranks are stiffer and stronger than Dura-Ace, and everyone in the biz knows it". Having said all that, the 7800s look ten times better, so I'd get those in a heart beat

mzeffex 

Well my point is the newer ultegra vs the older dura ace

Nachoman

7800.

mzeffex 

Alrighty. It is a lightly used 7800 vs a brand new 6700. I think I'll do dura ace since it is top of the line. Obviously.