Weight Weenies
* FAQ    * Search    * Trending Topics
* Login   * Register
HOME Listings Blog NEW Galleries NEW FAQ Contact About Impressum
It is currently Sat Dec 16, 2017 8:05 pm

All times are UTC+01:00





Post new topic  Reply to topic  [ 4 posts ] 
Author Message
PostPosted: Fri Jul 07, 2017 8:09 pm 
Offline

Joined: Fri Feb 03, 2006 12:10 am
Posts: 22
I am upgrading my road bike to the new Shimano 9150 Di2 system, and at the same time I am adding a Quarq DZero power meter (while trying to minimize the weight gain). My LBS told me that Shimano is not selling chainrings only (you have to get the whole crank set). My only option would be third party chainrings. I could get SRAM Red ETap chainrings with the power meter or another third party option.

My questions are:

Are the SRAM Red ETap chainrings compatible with the Shimano 9150 Di2 drivetrain (shifters/derailleurs/cassette)?
If so, what chain would I use?
If not, what chainrings would you recommend?

Thanks for your help,

Brian


Top
   
Posted: Fri Jul 07, 2017 8:09 pm 


Top
   
 
PostPosted: Sat Jul 08, 2017 1:23 am 
Offline

Joined: Thu Jul 19, 2012 6:09 pm
Posts: 1110
Location: Loveland, CO
I have the Quarq Red 22 cranks with Red chainrings, 50/34. Running DA 9070, Sram 1190 cassette, and DA 11-speed chains. Everything is running perfectly. I have never used the 4-arm DA chainrings. However I feel the Red chainrings are plenty stiff and I don't see any downsides to them. Price and weight wise I think they are way less than DA chainrings. Btw I also have Campy Bora wheels. So I care very little about matching brands.

A while back when 9150 first came out, there were reports of poor shifting while using a Sram 1190 cassette. When the poster put an Ultegra cassette on everything is fine. This makes little sense and I never saw an explanation for the problem.

I'm using the Sram 1190 11-28 cassette. I much prefer the Sram ratios as it includes a 16th cog. The Shimano DA doesn't and that's a deal breaker for me.


Sent from my iPhone using Tapatalk


Top
   
PostPosted: Sat Jul 08, 2017 1:52 am 
Offline

Joined: Wed Aug 31, 2011 2:36 am
Posts: 287
How about Praxis chainrings?

Sent from my SM-G930V using Tapatalk

_________________
Time VXRS Ulteam (7.16 kg)
viewtopic.php?f=10&t=120268


Top
   
PostPosted: Sat Jul 08, 2017 4:53 am 
Offline

Joined: Thu Jul 19, 2012 6:09 pm
Posts: 1110
Location: Loveland, CO
savechief wrote:
How about Praxis chainrings?

Sent from my SM-G930V using Tapatalk


Generally speaking, the lighter the rings the less stiff they will be, which will detrimentally affect shifting performance. Forging will make a chainring stronger but not stiffer. The key is to find the right balance between weight and stiffness. When shopping for a chainring I'd look at the weight to judge how stiff it'll be. Shimano has the patent on hollow rings so from a stiffness standpoint nothing will beat it.


Sent from my iPhone using Tapatalk


Top
   
Display posts from previous:  Sort by  
Post new topic  Reply to topic  [ 4 posts ] 

   Similar Topics   Author   Replies   Views   Last post 
There are no new unread posts for this topic. 9150 Di2 upgrade - compatibility with previous gen parts

in Road

ParisCarbon

6

739

Sun May 14, 2017 5:01 pm

kode54 View the latest post

There are no new unread posts for this topic. campagnolo centaur 11 speed chainring compatibility

in Road

JoO

1

269

Sun Oct 22, 2017 3:19 pm

JoO View the latest post

There are no new unread posts for this topic. Attachment(s) Shimano Compatibility

in Road

Valbrona

6

848

Mon Jan 02, 2017 10:55 pm

ooo View the latest post

There are no new unread posts for this topic. Shimano ST-R785 Compatibility EW-RS910 Junction Box

in Road

gazzaputt

3

388

Tue Sep 12, 2017 9:17 pm

gazzaputt View the latest post

There are no new unread posts for this topic. SRAM Red Chainring confusion

in Road

TimW

11

893

Mon Jul 24, 2017 5:35 pm

pdlpsher1 View the latest post


All times are UTC+01:00


Who is online

Users browsing this forum: 3Pio, crn, dudemanppl, kookie, Matt28NJ, ohhyeok90 and 30 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
Powered by phpBB® Forum Software © phpBB Limited