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PostPosted: Wed Dec 31, 2014 7:46 pm 
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Joined: Wed Dec 31, 2014 7:12 pm
Posts: 9
Looking to upgrade to power for my Argon Gallium.

I am looking at used Quarqs which are listed for like 760 grams total.

I am also looking at maybe purchasing a sram red crank gxp and then buying a stages rival arm and I think that would be around ~100 grams lighter than the Quarq option and still be lighter than just the SRAM Force crank I am running now.

Anyone run into this as well?


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PostPosted: Wed Dec 31, 2014 9:57 pm 
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Joined: Thu Jun 09, 2011 4:10 pm
Posts: 432
from http://cyclingtips.com.au/2013/11/stage ... er-review/

Quote:
In fact, the Stages unit only adds a mere 20g to the overall crankarm weight. In comparison, Garmin Vector adds ~55g, Powertap adds ~100-200g, Quark adds ~200g and SRM adds 150-200g.


The powertap number is high: its come down with the g3 hub. I'd wager that the spider based units are a bit more durable than the crank arm based ones, and they also measure both legs: there's a bit of risk with only measuring half and doubling it.

You might look at the 4iii precision if you are really worried about weight: it should be able to mount to the Red crankarm, and be a bit cheaper than stages. They should be showing up in the wild soon...


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PostPosted: Thu Jan 01, 2015 9:31 pm 
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Location: Drenthe, Holland
I've got that exact combination on my bike. (sram red drive side and rival+ stages nds) Please allow me some time to dismount and weight it for you.

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PostPosted: Fri Jan 02, 2015 1:16 pm 
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Location: Drenthe, Holland
Looked it up for you as that was faster. My 175mm sram rival crank with stages powermeter weights: 230.5 grams. Sadly I don't have the correct weight on the exogram red crank for you atm.

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PostPosted: Fri Jan 02, 2015 6:44 pm 
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Joined: Mon Oct 03, 2011 3:47 pm
Posts: 164
I pulled some stuff from my stock and came up with the following:

175 mm Red Exogram BB30
NDS - w/ spindle - 187 g
DS - 50/34 (no spindle) - 336 g

172.5 mm Red Exogram GXP
NDS - no spindle - 134 g
DS 53/39 (w/ spindle) - 461 g

So depending on the length and ring set you're using w/ the rival crank arm you're probably looking at 692 g ± 50 g.


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PostPosted: Sat Jan 03, 2015 5:57 pm 
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Joined: Mon Apr 21, 2014 9:17 pm
Posts: 157
Location: Belo Horizonte, Brazil
locktopus wrote:
I pulled some stuff from my stock and came up with the following:

175 mm Red Exogram BB30
NDS - w/ spindle - 187 g
DS - 50/34 (no spindle) - 336 g

172.5 mm Red Exogram GXP
NDS - no spindle - 134 g
DS 53/39 (w/ spindle) - 461 g

So depending on the length and ring set you're using w/ the rival crank arm you're probably looking at 692 g ± 50 g.



Had my friends crank weighted (Red GXP 172,5mm 50x34 + Stages Rival) and got 697g with some NON RED chainrings.


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