7900 DA shifters with Ultegra FD?

Discuss light weight issues concerning road bikes & parts.
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Leon
Posts: 222
Joined: Tue Jul 05, 2005 11:10 am
Location: On the road

by Leon

I know there have been pages with info around, some say it will work and some say not.

So who can tell me now:

If i'm going to get some 7900 DA sti's, can i ride with a 6600 Ultegra FD?

I know a 6600 RD will work with the 7900 DA sti.

I maybe want to upgrade to 7900 RD and FD later.

by Weenie


bradeng
Posts: 94
Joined: Sat Jun 16, 2007 9:29 pm

by bradeng

Won't work properly.

Shimano said no. We tried it anyway for fun. Shifting is beyond poor.

Leon
Posts: 222
Joined: Tue Jul 05, 2005 11:10 am
Location: On the road

by Leon

So if i want to buy a 7900 DA sti i need the FD also?

Or do you mean shifting on FD and RD will be poor?

BdaGhisallo
Posts: 1794
Joined: Wed Mar 17, 2004 1:38 pm

by BdaGhisallo

In order to get the front shifting to work adequately, you must pair a 7900 fr derr with the 7900 sti levers. Everything else pre-7900 can work just fine with the 7900 levers and all other bits, with the exception that the 7900 sti levers require 7900 brake calipers for optimum braking. 7800 and 6600 calipers will suffice, but braking will be sub-par.

Leon
Posts: 222
Joined: Tue Jul 05, 2005 11:10 am
Location: On the road

by Leon

Ok, thanks.

For the brakes, i just bought KCNC CB1 brakes. In other comment i read that the impact for the brakes isn't to big. It will end up with a softer or a harsher feel right?

Can anyone comment on that?

kulivontot
Posts: 1170
Joined: Sun May 16, 2010 7:28 pm

by kulivontot

Reviving dead thread. I have 6700 shifters, I moved to DA7900 FD. Front shifting is poor, now I'm surmising that there is a compatibility issue between this due to the lack of trim on DA7900 STI shifters. Can anyone confirm that this is my issue?

climberevan
Posts: 19
Joined: Wed Jan 23, 2013 5:42 am
Location: Tahoe, NV

by climberevan

I can't comment on the shifting compatibility, as I have 7900 shifters and derailleurs. I have Red brakes, though, and the braking is very weak, so perhaps there is some merit to the 7900 levers needing to be paired with the matching calipers....

What did they change to make the F derr not work? In my past experience front derailleurs have all been compatible, even across brands.

GT56
Posts: 571
Joined: Fri Jun 05, 2009 9:40 am
Location: Switzerland

by GT56

kulivontot wrote:Reviving dead thread. I have 6700 shifters, I moved to DA7900 FD. Front shifting is poor, now I'm surmising that there is a compatibility issue between this due to the lack of trim on DA7900 STI shifters. Can anyone confirm that this is my issue?


the 7900 FD does not require trim, which indeed the 7900 shifter does not provide

fd 6700 requires trim so does not work with 7900 shifters

i run fd 7900 with 6700 shifters and this works perfectly (it does not hurt to have trim on fd 7900)

by Weenie


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