HOT: Active* forum members generally gain 5% discount at starbike.com store!
Weight Weenies
* FAQ    * Search    * Trending Topics
* Login   * Register
HOME Listings Blog NEW Articles FAQ Contact About




Post new topic Reply to topic  [ 6 posts ] 
Author Message
 Post subject: Cheap Oval Chainrings?
PostPosted: Sun May 04, 2014 7:58 pm 
Offline

Joined: Fri Jan 31, 2014 4:54 pm
Posts: 220
Hello everyone.
I recently got a cheap carbon Sram crankset (Sram S900 I guess) from a friend.
The chainrings are dead and I need replacement.

I have now 52/36 Ultegra 6800 crankset and I am really happy. For the second one, I want to have oval chainrings but couldn't find any cheap. I don't want to spend too much money on them, since I have bad knees and it can be bad for me.
I remember, on eBay there was a few brands (Doval I guess, was one of them) but now I couldn't find any now.

Any recommendation for it?

I also have second question. I have Shimano BB now on bike, and I wonder if I can use it on Sram crankset?
I put it on bike, fitted nice and firm but I want to be sure. There are BBs on market for Sram or Shimano differently, so I wonder if there is any dimension differences.

Thanks!

_________________
Stava
Instagram


Top
 Profile  
 
PostPosted: Sun May 04, 2014 8:50 pm 
Offline

Joined: Tue Nov 11, 2003 9:47 pm
Posts: 1812
Location: Santa Cruz, California, USA
Sram GXP BBs are different from Shimano BBs. The ID of the NDS bearing is 22mm instead of 24mm. The GXP spindle is stepped down to 22mm on that side. When you tighten the fixing bolt the bearing inner race is trapped between the crank arm and the shoulder on the spindle. The spindle floats in the DS bearing. This keeps the crank located laterally without requiring setting bearing preload. It's a brilliant design.

The Sram Force GXP BB is inexpensive but has durable bearings and low drag.


Top
 Profile  
 
Posted: Sun May 04, 2014 8:50 pm 


Top
  
 
PostPosted: Sun May 04, 2014 10:22 pm 
Offline

Joined: Fri Jan 31, 2014 4:54 pm
Posts: 220
Thanks for the information.
So I am changing my BB to use the Sram crankset.

_________________
Stava
Instagram


Top
 Profile  
 
PostPosted: Tue May 06, 2014 10:17 pm 
Offline
Shop Owner

Joined: Thu Apr 17, 2008 1:07 am
Posts: 993
Location: San Juan, Puerto Rico
KCNC makes two types of oval / rectangular chainrings for compact cranks. The K3 Cobweb are oval and 34/50T....The blade chainrings are more rectangular like Osymetric and jump to 5/39t

_________________
www.royalbicycles.com


Top
 Profile  
 
PostPosted: Thu May 15, 2014 3:27 am 
Offline

Joined: Fri Aug 20, 2010 6:19 pm
Posts: 36
Rotors pop up used on ebay/forums pretty regularly. I'll vouch for em, I've had em on my race bikes for years. It's tough to ride normal rings once you get used to the feel.


Last edited by ninjaman on Wed May 28, 2014 3:05 pm, edited 1 time in total.

Top
 Profile  
 
PostPosted: Thu May 15, 2014 3:43 pm 
Offline

Joined: Mon Apr 09, 2012 10:48 pm
Posts: 102
I haven't used mine yet but I bought a set of Doval rings off ebay last summer. They appear to be pretty good quality and are CNC'd well but I can't speak for their performance/durability.

For 1/4 of the price of Rotor I'd say it's a great investment to try out the concept and then when they wear and you could replace them with something more expensive.


Top
 Profile  
 
Posted: Thu May 15, 2014 3:43 pm 


Top
  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 6 posts ] 


Who is online

Users browsing this forum: wooly, wrcompositi and 28 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:  

   Similar Topics   Author   Replies   Views   Last post 
There are no new unread posts for this topic. Oval Rings + Exogram

in Road

literider

9

925

Thu May 22, 2014 5:46 am

Illuminate View the latest post

There are no new unread posts for this topic. SLR Kit Carbonio Saddle with Carbon Rails (Oval)

in Road

Champ5000

3

402

Tue Oct 21, 2014 5:26 am

dwaharvey View the latest post

There are no new unread posts for this topic. 0-offset seatpost for oval carbon rails

in Road

mjduct

11

850

Sun Jun 15, 2014 2:20 pm

martinko View the latest post

This topic is locked, you cannot edit posts or make further replies. Ten cheap and easy ways of removing weight.

in Road

lima92

0

880

Tue Apr 08, 2014 9:59 am

lima92 View the latest post

There are no new unread posts for this topic. 130 BCD chainrings

in Road

JohnnySea

9

472

Thu Apr 24, 2014 1:49 am

mattyNor View the latest post


It is currently Thu Dec 25, 2014 9:11 am

All times are UTC + 1 hour




Advertising   –  FAQ   –  Contact   –  Convert   –  About

© Weight Weenies 2000-2013
hosted by starbike.com


How to get rid of these ads? Just register!


Powered by phpBB