What is the difference between dura ace 7800 and 7900




















Doo two hiz lack of edjucation RRoof just kan not speel and iz terrable wif bike nowledge and his Brifters R two hi. Post 8 of 29 views. I haven't looked at the latest full spec, so forgive me if I assume incorrectly, but based on the spec when I got my P2C, they used FSA cranks, house brand Tektro? Not worth it. Post 9 of 29 views. Interesting that you mention the issues with the Cranks were Rotor 3Ds special edition Tour yellow and black to match the frame.

Post 10 of 29 views. Post 11 of 29 views. This was all very helpful. I think I'm going to go for the 's. No one seems to have a story of the action of the 's being a lot better. I read that you don't have to trim the front on the 's. Not sure that is worth it. Post 12 of 29 views. I believe I read somewhere that Cervelo had to go with the DA because the front drivetrain would not work with the Rotor 3D's. If they were allowed to use the DA crankset, then they would have used the full DA group.

I have the DA full groupset on my RS. NO problems after miles in dry and wet weather. Post 13 of 29 views. So, why not use the rest of the groupo -- i. We know cost is no object with these bikes.. Post 14 of 29 views. Which means that if you have to use the Rotor Crankset, and the DA front derailleur won't work, but the DA front derailleur will work.

Then you cannot use the DA ST Levers, which means you also cannot use the rear derailleurs. Post 15 of 29 views. Not worth the mismatch.. It's too bad everything is not back compatible.. I'm sure if there was a performance difference, Cervelo would have used something other than the Post 16 of 29 views.

Not to concerned with 11 speeds as much as I am about functionality, good shifting, braking, etc. Opinions needed and appreciated. Thanks Jack. Originally Posted by farmallguy. Find all posts by oldpotatoe. If the DA is in good working order, stick with it. If needed, just replace the wear items cables, chain, cassette, chainrings, brake pads. I like much better than No experience with DA or Ultegra Dead Man.

I have both and I can't say which is "better," as they both have their positives and negs. I think the has the cleanest, crispest shifting feel of anything I've ever ridden. I have only peddled around on friend's groups a few times, but it also appears to be super clean and responsive with regard to both front and rear shifting, plus the braking is also really good - it's really, function and cost wise, the best of all worlds.

Probably the best overall value group ever. It's freaking hideous. And since that's also the least expensive option, I'd probably stick with that. Unless you just really want to upgrade because you just really want to I'd probably go , for vanity sake. Originally Posted by oldpotatoe. Ken Robb. Do all of these brake levers pull the same amount of cable?

If not do we have to match calipers with levers with matching pull? Whenever I see one of these threads I always wonder what do the people on this forum think is the life expectancy of a group like Dura Ace?? I think the life expectancy certainly exceeds the model life.

I see guys still riding fully functioning , but in a world of always lighter and planned obsolescence, small parts availability becomes an issues. Dura Ace goes forever. I think housing is a highly under-rated piece of maintenance that's responsible for a lot of unnecessary groupset upgrades. I think dudes put k on their groups, shifting starts to get soft and fiddly, and they decide it's time for a new bike.

They're reaching for cables - bring back ! Oh yeah, it's way smooth, haven't fiddled with it in 3 years Working in the biz, I had a chance to work on and ride pretty much everything on the market the since then.

The horrid ergonomics and butt ugly STI levers of the era drove me to Campagnolo for almost a decade. Early last year I bought a group which i've put about 15,km's on. Finally, shimano seemed to have acknowledged the error of their ways, and designed a decent STI hood shape in the I don't care much for 'light action' lever feel, likely because i'm not an eleven year old girl, and i'm capable of moving a lever blade with more force than it takes to lift a cup cake.

I'm not keen on the fact shimano has it appears caved to the dumbing down of the levers again, but their shape is right on the money, and that's likely to keep me as a customer. It performs just about flawlessly.

There is the so called "orphaned" rear hub issue I started a thread about on the tech board. Sure, cables under the bar tape looks a lot cleaner, but the exposed cables allows the installation of that little optical gear indicator on the right hand cable. I can quickly confirm without looking at the rear wheel my worst fear - I am indeed in my lowest gear.

Attached Images RT Shifter. I know that Shimano sponsored Freddy Maertens' teams as far back as the s. Were there any advantages then? Was the quality as good as now relative to their competition? I know they had just a small chunk of the market then but they were around. Originally Posted by Saab



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