DA 7900 Issues
#26
Senior Member
Joined: Sep 2008
Posts: 7,296
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From: Loveland, CO
Bikes: Cervelo Rouvida x 2
Last time I looked, I could get a Record 11 group for $1500 or an SR group for $1800. If money is a issue, Chorus is about $1100 and Athena $7-800. You can mix and match as desired. I can buy 3 chorus cassettes for price of one SR, so Chorus it is. They also last twice as long.
#27
I eat carbide.


Joined: Jan 2006
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Likes: 1,417
From: Elgin, IL
Bikes: Lots. Chapter2, Van Dessel, Giant, Trek, etc Dealers for BMC, Chapter2
Totall OT, but to me their excessive use of that carbon weave makes it look like some sort of Euro-trash version of camouflage pattern. Kind of like the Euro equivalent of "Realtree".
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#28
Senior Member
Joined: Sep 2008
Posts: 7,296
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From: Loveland, CO
Bikes: Cervelo Rouvida x 2
Buy a Chorus FD and RD - no carbon cages. There's not much weight difference. That leaves the shifters and the RD body. No cure for those areas, unless you step down to an Athena RD.
#29
Aluminium Crusader :-)

Joined: Apr 2004
Posts: 10,050
Likes: 11
From: Melbourne, Australia
actually, the real reason Cervelo went back to 7800 was that the team was having front shifting problems because they use Rotor chainrings. the front derailleur has to sit much higher over these chainrings and the wider 7900 fd cage, combined with the higher fd placement, made chain dropping more of an issue. round chainrings would eliminate that. but then again, Rotor pays the Cervelo team money and Shimano doesn't...
Last edited by 531Aussie; 10-30-09 at 06:11 PM.
#30
Señor Member
Joined: Aug 2008
Posts: 3,744
Likes: 14
From: Brooklyn, NY
Bikes: 2018 Lynskey R380 Ti | 2011 Hampsten Travelissimo Gran Paradiso Ti | 2001 De Rosa Neo Primato - Batik Del Monte, Genius | 1991 Eddy Merckx - Motorola, TSX
Things I did/do like about SR11 is that the brake lever actuation is the best I have ever felt from any manufacturer. Also, the crank as well as brake calipers looks really nice in my opinion.
If I lived somewhere with real mountains, and not the hill we call Bear Mountain, I might see how SR11 would be convenient, since it can shift down more than 2 cogs at a time.
However, Di2 basically solves any and all of these issues, be it cable routing, cable pull ratio, shifting under load, cross chaining, etc.
#31
I eat carbide.


Joined: Jan 2006
Posts: 21,678
Likes: 1,417
From: Elgin, IL
Bikes: Lots. Chapter2, Van Dessel, Giant, Trek, etc Dealers for BMC, Chapter2
It also solves that problem people have with extra cash laying around...just sayin....
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#34
I eat carbide.


Joined: Jan 2006
Posts: 21,678
Likes: 1,417
From: Elgin, IL
Bikes: Lots. Chapter2, Van Dessel, Giant, Trek, etc Dealers for BMC, Chapter2
So will unicorn blood. I hear it's lubricity is un-matched.
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#35
Senior Member
Joined: Sep 2008
Posts: 7,296
Likes: 577
From: Loveland, CO
Bikes: Cervelo Rouvida x 2
Some people have been unable to fix their cable friction issues, and others don't even know they have it. They just keep changing the tension adjustment in an attempt to fix the problem. That approach will never work. The best thing to do is start all over with new a new cable and housing on the right side. I would try Shimano or Yokozuna housing with a Campy cable. I also recommend the behind the bar routing, not the front. Make the housing lengths generous. I increased the rear loop so it's a least an inch longer than the Campy precut housing.
#36
Senior Member
Joined: Nov 2007
Posts: 710
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From: CenCal - SLO
Bikes: S2, Wilier GTR (Arr), Giant VT, Myata 3-10
Jagwire + cablehousing ends properly cut and dressed + cable portion that rides in the housing treated with Dow G-1050 (I have a tube of 50's era precursor my Pop gave me) = ultralow friction cable setup
To keep it that way boot the ends of the housing to keep the crap out, especially if you ride in sand mixed with salt and frozen sludge.
To keep it that way boot the ends of the housing to keep the crap out, especially if you ride in sand mixed with salt and frozen sludge.
#37
Señor Member
Joined: Aug 2008
Posts: 3,744
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From: Brooklyn, NY
Bikes: 2018 Lynskey R380 Ti | 2011 Hampsten Travelissimo Gran Paradiso Ti | 2001 De Rosa Neo Primato - Batik Del Monte, Genius | 1991 Eddy Merckx - Motorola, TSX
What didn't you like? I've got three bikes with 11 speed and they all shift as well as anything I've ever ridden. None of them required a single adjustment after the cables seated in during the first few rides. That's normal with any cabled system. Two of my bikes don't even have frame mounted cable tension adjustment.
Some people have been unable to fix their cable friction issues, and others don't even know they have it. They just keep changing the tension adjustment in an attempt to fix the problem. That approach will never work. The best thing to do is start all over with new a new cable and housing on the right side. I would try Shimano or Yokozuna housing with a Campy cable. I also recommend the behind the bar routing, not the front. Make the housing lengths generous. I increased the rear loop so it's a least an inch longer than the Campy precut housing.
Some people have been unable to fix their cable friction issues, and others don't even know they have it. They just keep changing the tension adjustment in an attempt to fix the problem. That approach will never work. The best thing to do is start all over with new a new cable and housing on the right side. I would try Shimano or Yokozuna housing with a Campy cable. I also recommend the behind the bar routing, not the front. Make the housing lengths generous. I increased the rear loop so it's a least an inch longer than the Campy precut housing.
While I did like the hood shape initially, I could see immediately that it limited the possible positions for long distance rides, where I like to plop my hands on top of the hoods (Campy 10 had a better shape in this regard).
Furthermore, I'm usually riding in the drops on my weekend hammerfest rides. shifting to a higher gear with the right thumb shifter is a real p.i.t.a. in this regard.
Again, if I climbed a lot I think I would seriously look at SR11 as well as compact gearing; however, there are no mountains to climb in NY. Therefore, for the type of riding I do, there are better options for me at a better price.
I am not saying that SR11 is worse as a groupset; I am saying for my own utility, there are better options in terms of price and what I need/want.
Jagwire + cablehousing ends properly cut and dressed + cable portion that rides in the housing treated with Dow G-1050 (I have a tube of 50's era precursor my Pop gave me) = ultralow friction cable setup
To keep it that way boot the ends of the housing to keep the crap out, especially if you ride in sand mixed with salt and frozen sludge.
To keep it that way boot the ends of the housing to keep the crap out, especially if you ride in sand mixed with salt and frozen sludge.
I'm tempted to try some Yokozuna Reactions after this winter is up but it just seems crazy to spend $50 on cables when you can get stainless for $5 a pop...
#38
Senior Member
Joined: Sep 2008
Posts: 7,296
Likes: 577
From: Loveland, CO
Bikes: Cervelo Rouvida x 2
After using Campy since 1995, I think the new brakes/shift levers are an improvement in every respect. I've got small hands with short fingers. I find the brake hood more comfortable by far. The finger lever throw to lower gears has been reduced from what was required with any previous ergo lever. The lever is also easier to move. It still has the ability to shift 3-cogs larger (compared to only two with 7900). Braking from the hoods is better than before. If you were getting clunky shifts, particualrly to smaller cogs, the shift cable tension was just too low - perhaps an attempt of fix cable friction.
Using the thumb button from the hooks is not a high point, but even my small hands can do it. I prefer that penalty to tap,tap,taps.
Using the thumb button from the hooks is not a high point, but even my small hands can do it. I prefer that penalty to tap,tap,taps.










