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PostPosted: Thu Jun 07, 2012 7:26 pm 
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Joined: Sat Jun 20, 2009 3:23 am
Posts: 78
How much space is there between the crank and the ring? Not a huge worry, but if you throw the chain over will it wedge between the crank and ring (since the peg will be in the wrong spot due to the hidden chainring bolt)? Otherwise, seems to be the new budget ww BB30 crank.


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Posted: Thu Jun 07, 2012 7:26 pm 


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PostPosted: Thu Jun 07, 2012 7:29 pm 
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Location: On the bike
I am curious about stiffness as well. Sounds like SRAM has made some needed improvements with the cranks. But for the cost, you can get a Hollowgram SI crank that will be the same weight all in. Not sure the Red is going to be as stiff as the Hollowgram.


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PostPosted: Thu Jun 07, 2012 10:28 pm 
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Joined: Mon Dec 08, 2003 1:37 am
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Location: Sewickley, PA
prendrefeu wrote:
...on a scale.

Just because, you know, as someone who has been a member since 2003 would be familiar with, scale shots are required for verity on this forum.



Not going to pull the crank back off but here is the ring and my crank:
ImageImage

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Curt Brown
2012 Cannondale Supersix EVO SRAM Red 12.5#'s

2011 Cannondale Carbon Flash 1 17.9#'s

http://cbevo.com/2012_cd_supersix_evo_31.html


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PostPosted: Thu Jun 07, 2012 10:30 pm 
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Location: Sewickley, PA
53x12 wrote:
I am curious about stiffness as well. Sounds like SRAM has made some needed improvements with the cranks. But for the cost, you can get a Hollowgram SI crank that will be the same weight all in. Not sure the Red is going to be as stiff as the Hollowgram.



The new Red crank is very stiff, much better than the 2011 Red unit, plenty stiff for me at 145#'s. Now the TA ring is fine for me but I would think a 200# sprinter type should get a set of Praxis rings, light and strong.

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Curt Brown
2012 Cannondale Supersix EVO SRAM Red 12.5#'s

2011 Cannondale Carbon Flash 1 17.9#'s

http://cbevo.com/2012_cd_supersix_evo_31.html


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PostPosted: Thu Jun 07, 2012 10:48 pm 
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Location: Los Angeles
Thanks for the photos.

The weight on that chainring. YIKES. :shock:

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PostPosted: Thu Jun 07, 2012 10:49 pm 
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Sounds like an easy way to shed a bit of weight! I guess we just have to find some rings that are the correct thickness at the hidden bolt location so we don't get runout issues. It probably won't be long before TA/Fiberlyte/etc make rings with movable catchpins so it'll work on this crank.


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PostPosted: Thu Jun 07, 2012 11:11 pm 
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Though the Sram chainring is pretty heavy compared to others it does have some aero advantage.


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PostPosted: Fri Jun 08, 2012 5:06 am 
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53x12 wrote:
I am curious about stiffness as well. Sounds like SRAM has made some needed improvements with the cranks. But for the cost, you can get a Hollowgram SI crank that will be the same weight all in. Not sure the Red is going to be as stiff as the Hollowgram.


I have been trying to look for Hollowgram SI's or SL's but have not had luck finding them sub $500. And with SRAM being <400, that would be a good buy.


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PostPosted: Fri Jun 08, 2012 8:37 pm 
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Location: Hungary
So, what do you think, why do SRAM put so much material into it?
wasting 64grams of aluminium?


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PostPosted: Fri Jun 08, 2012 9:25 pm 
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Interesting. My Evo has Sram Red compact rings and when I replaced them with Praxis Works rings I weighed the Red rings together and came up with 138g.


Attachments:
compact chain rings post.jpg
compact chain rings post.jpg [ 118.73 KiB | Viewed 1539 times ]
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PostPosted: Sat Jun 09, 2012 1:16 am 
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Location: Sewickley, PA
Broid wrote:
Interesting. My Evo has Sram Red compact rings and when I replaced them with Praxis Works rings I weighed the Red rings together and came up with 138g.



That's OLD Red, I Have the new 2012 Red.

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Curt Brown
2012 Cannondale Supersix EVO SRAM Red 12.5#'s

2011 Cannondale Carbon Flash 1 17.9#'s

http://cbevo.com/2012_cd_supersix_evo_31.html


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PostPosted: Sat Jun 09, 2012 1:19 am 
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Location: Sewickley, PA
ave wrote:
So, what do you think, why do SRAM put so much material into it?
wasting 64grams of aluminium?



I would not say wasting, the new ring shifts great and is the stiffest I've seen, but at 145#'s on an 11# bike I don't need them that stiff, thus the lighter ring(WW you know:)).

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Curt Brown
2012 Cannondale Supersix EVO SRAM Red 12.5#'s

2011 Cannondale Carbon Flash 1 17.9#'s

http://cbevo.com/2012_cd_supersix_evo_31.html


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PostPosted: Sat Jun 09, 2012 5:18 am 
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Joined: Wed Jan 14, 2009 7:16 pm
Posts: 144
Location: Brisbane CA
I am sure this isn't true, "Compatible only with SRAM Yaw Front Derailleur"

Thanks for sharing!


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PostPosted: Sun Jun 10, 2012 5:20 pm 
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Formerly known as PezTech
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Posts: 5645
Location: Phoenix Arizona
The Yaw of the front der doesnt have as much to do with shifting as it does in dealing with chain line. The lift and more firm action is where the shifting benefit comes in


It's also off base to say the new cranks are "a lot" stiffer than the old ones. Theyre not. The old ones were pretty dang good. The thing that most folks are feeling is a much better ring design and a much improved front Der action. That said, I wouldnt hesitate to go to the new praxis rings and cut weight without giving much away (if anything at all) in shifting.

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Posted: Sun Jun 10, 2012 5:20 pm 


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PostPosted: Sun Jun 10, 2012 8:51 pm 
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Posts: 244
Location: Sewickley, PA
Your right on the crank stiffness thing, I don't think I could flex any crank at 145#'s! Im ordering the Praxis rings also.

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Curt Brown
2012 Cannondale Supersix EVO SRAM Red 12.5#'s

2011 Cannondale Carbon Flash 1 17.9#'s

http://cbevo.com/2012_cd_supersix_evo_31.html


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