Shimano 7900, 6700 shifting not as good as 7800, 6600

Discuss light weight issues concerning road bikes & parts.
bikedoc
Posts: 642
Joined: Thu Aug 16, 2007 3:16 pm

by bikedoc

bin it and go back to 7800 if you want good rear shifting, Ive worked on hundreds of 7900 setups with loads of different cable options and none work as well.

mimason
Posts: 654
Joined: Tue Feb 24, 2009 11:43 pm
Location: Florida

by mimason

Just wait for 11sp Shimano when shifting takes another dive. IMO shifting was best with 8 and 9 speed drivetrains.

by Weenie


jasjas
Posts: 131
Joined: Sun Aug 23, 2009 10:15 am

by jasjas

Look 595 internal (std shimano) cable routing - 7900 - and it shifts like a dream, easily as good as the Ultegra sl on my other bike.
Its a different feel, yes but does the job and the hoods i find more comfy :D and i dont find the setup of it any different from any other Shimano 10sp.
Downside - the shifters seem to rattle far more than i'm used too.

HillRPete
Posts: 2292
Joined: Tue Apr 12, 2011 8:08 am
Location: Pedal Square

by HillRPete

Been running 7900 for like 3 years, now got a secondary bike with 6700. Interestingly the 6700 feels way smoother, much more like the 6600 (which I thought had the mechanical advantage of avoiding the handlebar bends). Anyway my 7900 and 6700 are set up very similar, both externally routed to the frame, Nokon housing, KMC chain. Surprised there is such a difference, the 7900 requires more force to shift, and feels snappier, the 6700 is very smooth.

NealH
Posts: 492
Joined: Sat May 12, 2007 3:40 am
Location: Triange, NC

by NealH

My 7900 has been shifting perfectly for 3 3 years. It required slightly more force to shift at first but, once I installed Gore Ride-On Pro cables it shifts as smooth and refined as my 7800 equipped bike. In fact smoother. So the derailleur cable does make a difference.

CerveloMikey
Posts: 80
Joined: Tue Sep 16, 2008 11:20 pm
Location: Burbank, CA

by CerveloMikey

Ride a 9000 bike and you will hate your 7900 rear shifting!
R2.5 / R3 / S-Works 29er (20 lbs) / S-Works SL4 Di2 (14.7 lbs)

Grill
Posts: 662
Joined: Mon Aug 20, 2012 12:12 pm
Location: Oop North

by Grill

Shifting with my bikes in order of ease and smoothness:
7970>6800>7900>6700

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cerro
Posts: 1383
Joined: Fri May 12, 2006 2:11 pm
Location: Stockholm, Sweden
Contact:

by cerro

wassertreter: Wait for a while when the wires isn't new and 6700 sucks. Works shifting performance and really sensitive with wire. Even 105 5700 is better.
/jonas l
http://cerrol.wordpress.com (my cyclingblog)

dunbar42
Posts: 191
Joined: Tue Jan 07, 2014 9:20 am

by dunbar42

I installed 9000 cables on my 5700 equipped bike. Makes a big difference in shift quality. With regular Jagwire cables the bike shifted noticeably worse than my 4600 Tiagra equipped bike.

I will probably go with 6800 cables next time to save a few dollars.

fromtrektocolnago
Posts: 989
Joined: Sat Dec 07, 2013 10:15 pm

by fromtrektocolnago

I've used 6500, 6700 and 6800. 6500 is better than 6700 but Shimano has done its homework with 6800. Excellent set.
Colnago C-59 (Dura Ace)
Firefly(Ultegra)
Trek 5200(ultegra)

CerveloMikey
Posts: 80
Joined: Tue Sep 16, 2008 11:20 pm
Location: Burbank, CA

by CerveloMikey

Grill wrote:Shifting with my bikes in order of ease and smoothness:
7970>6800>7900>6700


Ride a 9070 bike! Sick! Nothing like it!
R2.5 / R3 / S-Works 29er (20 lbs) / S-Works SL4 Di2 (14.7 lbs)

project3
Posts: 211
Joined: Tue Jul 14, 2009 2:18 am

by project3

Using 7900 now and before upgrading to 9000 my LBS ask me to try shimano sp41. Worth to give a try?

ToffieBoi
Posts: 357
Joined: Fri Jan 31, 2014 4:54 pm

by ToffieBoi

I was riding on 6600SL, 6700 and 6800(with 9000 shifters) groupsets.

6600 was better than 6700. 6800 is better than 6700 also, but I can't really say that it is better than 6600. Feel on the shifter was better on 6600 I think.

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