ultegra 6770 vs DA 7970

Discuss light weight issues concerning road bikes & parts.
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fancycoconut
Posts: 27
Joined: Tue Apr 22, 2014 2:17 am

by fancycoconut

I am upgrading to di2 10speed from ultegra, staying with 10 speed because 10speed junior cassettes are much more common in wheel vans than 11 speed junior cassettes.

I was originally planning on buying DA 7970 from a friend, but now i am considering buying 6770 because of the e-tube system, and reformed tech. I will only be buying FD,RD,shifters, battery etc., no brakes (i have cnc brakes), or crank (pmeter). what do you guys think? I think 6770 is heavier than 7970, besides that i dont know...
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sharkman
Posts: 1400
Joined: Fri Jun 25, 2004 8:32 pm
Location: the Netherlands

by sharkman

Go 6770, although DA7970 is a bit better/lighter (in fact I believe it's even more reliable than the new 9070) in time you will only need a 6870 rear mech chain and 11v cogset to "upgrade".
The four wire protocol of the 7970 will die a slow death and parts/cables will become more expense/harder to obtain in the near future.

glepore
Posts: 1089
Joined: Thu Mar 28, 2013 4:42 pm
Location: Pa USA

by glepore

Go 6770, although DA7970 is a bit better/lighter (in fact I believe it's even more reliable than the new 9070) in time you will only need a 6870 rear mech chain and 11v cogset to "upgrade"The four wire protocol of the 7970 will die a slow death and parts/cables will become more expense/harder to obtain in the near future..

:thumbup: Wisdom. Get the internal battery and etube software as well.
Cysco Ti custom Campy SR mechanical (6.9);Cannondale SS Evo Di2 7970 (5.79); Willier Cento Uno Air Di2 9070 (7.0); C40 Mk2 DA 7800 ; Anvil Custom steel Etap;1996 Colnago Technos Record

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