$500...What crank arm set?

Discuss light weight issues concerning road bikes & parts.
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2ndgen
Posts: 617
Joined: Mon Jul 05, 2010 5:18 pm

by 2ndgen

I'm thinking my CAAD is deserving of a different set of crank arms.
I'd love to get a Hollowgram set as that seems like the proper thing
to do, but it's a non-BB30 frame so I'm looking for another option.

I'd like to be able to keep the Dura-Ace 7800 BB & Praxis 53/39 Chainrings.

Of course, the main reason for possibly getting out of the Ultegra SL crank
would be for significant weight savings. I've calculated the entire set-up to come
in at 773g (rings, bolts, BB, crank). A Dura-Ace 7800 crank is out of the question.
Oh, and it HAS TO BE Black (carbon would be nice as well).

So, since I can't slap on a Hollowgram, what are my options if I decide to go all the way with my drivetrain?

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2002SaecoReplica
Posts: 1944
Joined: Mon Oct 25, 2004 10:02 pm
Location: Getting dropped

by 2002SaecoReplica

7900 crankset
or
Rotor 3D+ with BSA30 adapter.

/thread
- Zipp rims will break if you look at them too hard
- R-Sys wheels will spontaneously explode
- The ZG crankset will never, ever exist
- Everyone needs Lightweights, even if they're fat and old
- Parts actually made of metal are SO 10 years ago

by Weenie


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Kastrup
Posts: 575
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Location: Aarhus, Denmark

by Kastrup

What about the Rotor 3D without the +?
"Stay cool and try to survive" A. Klier to the other members of the Garmin classics squad the night before P-R.

Rippin
Posts: 609
Joined: Thu Feb 19, 2004 9:58 am

by Rippin

Lighter, carbon and $500 and under:

Red Black crankset, then strip the graphics?
____o
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Bling
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Joined: Fri Apr 29, 2011 5:14 pm
Location: Top of the Podium

by Bling

KCNC K-Type looks great. I just got one and it comes in at 620g with the BB and rings.
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Briscoelab
Posts: 1730
Joined: Thu Jan 26, 2006 6:01 pm

by Briscoelab

A 7900 crankset would look great on your bike. Keep the DA rings on there though.

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Getter
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Joined: Sat Nov 14, 2009 6:30 am
Location: So Cal

by Getter

I'd go with the 24mm spindle 3D. I highly doubt that you'll be able to tell the differences vs the 3D+.

Looks-wise, if you run Shimano cranks you have to run the Shimano rings...or else it just won't look right. The Praxis rings at first glance look just like the rings off a SRAM Red crank. If you run the Rotor...it won't look so obvious.

justkeepedaling
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Location: by Crystal Springs (Sawyer Creek Trail)

by justkeepedaling

Dura Ace 7900

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Gearjunkie
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Location: NZ

by Gearjunkie

Bling, good weight for your KCNC.

Is it standard or compact and what length?

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2ndgen
Posts: 617
Joined: Mon Jul 05, 2010 5:18 pm

by 2ndgen

Thanks for all the replies.
DA7900 won't garner me much of a benefit as it's barely a 48g loss.
I think there'll be compatibility issues as well right?
(will have to go with a 7900 chain? cassette?)

I'll keep reading & researching. Thanks. :thumbup:

Hopefully, one day, someone will actually make a non-BB30 adapter for a Hollowgram.

aaric
Posts: 439
Joined: Thu Jun 09, 2011 4:10 pm

by aaric

2ndgen wrote:Thanks for all the replies.
DA7900 won't garner me much of a benefit as it's barely a 48g loss.
I think there'll be compatibility issues as well right?
(will have to go with a 7900 chain? cassette?)


No compatibility issues. No chain or cassette replacements needed (other than considerations if your existing cassette/chain have a lot of wear that you'd have with any new set of rings)

Also, you'll lose 48g, but gain a lot of stiffness. Conventional wisdom is that to gain much weight off of a DA7900 crank, you'll give up a ton more stiffness and shifting quality, which is why you are getting a ton of recommendations for the 7900.

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prendrefeu
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by prendrefeu

2ndgen wrote:Hopefully, one day, someone will actually make a non-BB30 adapter for a Hollowgram.


It would require a custom spindle as well, as the lengths & location of bearings will be different. The diameter of the spindle isn't an issue however, just the length.
Exp001 || Other projects in the works.

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shoopdawoop
Posts: 433
Joined: Thu Dec 22, 2011 12:37 am

by shoopdawoop

Perhaps save up a little more and get a power meter? If not my vote goes to a Rotor.

2002SaecoReplica
Posts: 1944
Joined: Mon Oct 25, 2004 10:02 pm
Location: Getting dropped

by 2002SaecoReplica

2ndgen wrote:Hopefully, one day, someone will actually make a non-BB30 adapter for a Hollowgram.


They already do, it's called Rotor 3d+ with BSA30 adapter.
- Zipp rims will break if you look at them too hard
- R-Sys wheels will spontaneously explode
- The ZG crankset will never, ever exist
- Everyone needs Lightweights, even if they're fat and old
- Parts actually made of metal are SO 10 years ago

by Weenie


davej35
Posts: 57
Joined: Sat Feb 18, 2012 9:37 am

by davej35

DA 7900 is exactly good choice if you're looking for a combination of lightweight and durability.

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