Dura Ace 7900 levers (compatibility etc) - Page 2

Didn't quite understand ur thread about the Waterford. What are u trying to say when u write:
"I could rub the fder on the chain at will. "

From what I have used, neither the 7800 nor the 7900 have inward trim when on the big ring and moving back up the sprockets (towards the large sprocket) because DA have set up their groups so even on the large ring-large sprocket trim is not necessary but you shld know that shouldnt you Pete being the perfect LBS and you could have mentioned something way back in this thread about DA not having chain rub.
I think it is great that you are the perfect LBS but it is irrelevant as you are not my LBS. It would be great if u were. I have been walking off with so called "serviced" bikes dozens of times in different shops in the UK and Spain where the job was not simply done:
1> Asked for a DA cranket to be put on. Get bike home and crankset is on so tight that take it to another shop to have it loosened in 2008. In the second and third shop they don-t realise that the reason why the chain is sticking in between the rings when going from large to small ring. It is I who suggests that the FSA inner ring is creating the problem. We change the ring thanks to me.
2> Pamplona 2000= Spend 2000 pounds on a new road bike. LBS sets up stem so badly that when back in the UK LBS says that my life was in danger cos of various problems associated with cowboy setting up of this contact area.
3> Countless examples of an LBS supposedly setting up or servicing drive train but leaving the bike with a painfully short chain and mechs well out of adjustment.
4> LBS in the UK whose mechanics used to take bikes in for a service, do nothing to it apart from a polish, give it back and charge customer. Happened to me and I threatened them. They quickly sorted me out with a discount groupset.
So Pete, it's not the exception its the rule. It's very sad but I am sure that there are many LBS mechanics and repsonsible owners who do offer excellent service. When I take my bike in for something I normally end up spending time returning it for it to be done properly or finshing off the fine tuning myself. How? Cos as a 15yr old kid I used to mess about with bikes, building and rebuilding drivetrains, I wld touch anything apart from hset and bb.

__________________
Scott Addict 2008 R4
HED JET 50mm 2007
Record/Chorus/Centaur/Ultegra mix
50/34 12-25
7,54kg

Cannondale Six13 Pro
Mavic Cosmic SL 2009
Dura Ace 7900/7800
12-25 52/39
7.70kgs

In a nut shell. Modern shift levers have lost some of their function, shimano particularly. Left now has no trim and left has 1 less gear you can select with a sweep of the big lever. It seems everything is about weight, much less about function.

Poor bike shops everywhere. Good ones as well, just like Ferrari, Alfa, and Ducati mechanics, gotta find them.

But when DA went STI in about 1990, I believe it didn't have the trim then. DA never had it. Campy does, which is why some prefer Campy.
Have u tried the full 7900 to see if there is zero trim on it???
Maybe you could give us a review of it?? Most , if not all of my MTB buddies would never dream of putting Campag on their road bikes beacause for them it is not synoynmous with function. for them Shimano means function.
But wasn't Shimano aim this year to give the consumer what it wanted such as compact crankset (which is what they should have done ages ago), concealed cables, more cassette ratios such as an 11-28 <so that Alienator could get out of his garage> carbon, even lighter components, even better braking???? Isn't function about something like eliminating chain rub??
I will be retesting the Addict which as the following group: Record Ergo 2008, centaur carbon mech, centar CT fmech, DA chain, veloce cassette, Ultegra SL c/set, chorus non skeletal calipers, to see what I prefer.

__________________
Scott Addict 2008 R4
HED JET 50mm 2007
Record/Chorus/Centaur/Ultegra mix
50/34 12-25
7,54kg

Cannondale Six13 Pro
Mavic Cosmic SL 2009
Dura Ace 7900/7800
12-25 52/39
7.70kgs

First gen DA, out in late 80s, did have trim in the left lever. 7900 does not have trim in the left lever. I think it does not because the innards are a derivative of MTB sti 'guts', and the LH MTB lever has no trim.

The 7900 left STI lever does have trim, but for the small ring only.

Have no knowledge of the earlier or later stuff, but my DA 9 sp triple LH STI (7703?) from 2003 has trim which works on all three rings.