Which compact crank with DA7800

Discuss light weight issues concerning road bikes & parts.
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HillRPete
Posts: 2292
Joined: Tue Apr 12, 2011 8:08 am
Location: Pedal Square

by HillRPete

A bit of a retro project going on here, with DA7800 drivetrain. Unfortunately the 7800 didn't seem to come with a compact/110BCD crank, which is unfortunate for a quad impaired wannabe climber like me.

What would people recommend? 7900 cranks have the strong dark accents, Ultegra might work, but to be honest, I think the silver Athena looks best, a bit more unobstrusive than the Shimanos. (Maybe just polish the decals off ...)

Any alternatives?

Edit: Looks wise the plain FC-R700 seems to be a good match too, at least for the time being.
And here's a nice Sugino, not sure which BB standard though.


by Weenie


Briscoelab
Posts: 1728
Joined: Thu Jan 26, 2006 6:01 pm

by Briscoelab

7800 SRM? :)

My wife has a spare bike with a regular 7800 crank, with a 50T outer and a 38T inner. Shimano makes an official 7800 50T ring. Looks nice.

russianbear
Posts: 757
Joined: Wed Apr 11, 2012 3:40 am

by russianbear

I have a r700 compact and it's super stiff. A bit porky, but can't complain. Maybe some after market rings would be an option too.

NGMN
Posts: 1536
Joined: Mon May 30, 2005 7:13 am

by NGMN

I think either 6700 or Athena is a good bet aesthetically.

yoshirider
Posts: 17
Joined: Wed Feb 06, 2013 3:58 pm
Location: SoCal

by yoshirider

how about the Ultegra SL compact crank FC-6650-S? it's lighter than the FC-R700. this is afterall weight weenies :)

Burgunder
Posts: 60
Joined: Tue Aug 14, 2012 7:36 am

by Burgunder

The Tune Smart Foot might be an option to if the vintage look is important it comes in silver so thats no problem.

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

by HillRPete

Thanks everyone, FC-6650-S looks like a great candidate, if I can find one in 175mm, otherwise the R700 probably. (Even got a silver Smart Foot on stash, but it doesn't fit the rather burly frame, saving that for another build ...)

Edit: Seems Wiggle has it, but not at a discount one would expect for previous generation groupset :(

JMT
Posts: 35
Joined: Wed Feb 22, 2012 3:16 pm

by JMT

Is it the smaller ring you want to be able to reduce to 34 or the bigger one? If it is the bigger one you can get 50 or 46 rings for 7800 130 bcd.

totoboa
Posts: 88
Joined: Thu Dec 13, 2012 4:24 am
Location: Sierra Foothills, California USA

by totoboa

JMT wrote:Is it the smaller ring you want to be able to reduce to 34 or the bigger one? If it is the bigger one you can get 50 or 46 rings for 7800 130 bcd.


What I was thinking :D

by Weenie


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