Go Back  Bike Forums > Bike Forums > Bicycle Mechanics
Reload this Page >

DA 9000 v DA 7900

Search
Notices
Bicycle Mechanics Broken bottom bracket? Tacoed wheel? If you're having problems with your bicycle, or just need help fixing a flat, drop in here for the latest on bicycle mechanics & bicycle maintenance.

DA 9000 v DA 7900

Thread Tools
 
Search this Thread
 
Old 02-10-17, 06:40 PM
  #1  
Member
Thread Starter
 
Join Date: Jun 2015
Posts: 37
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 3 Post(s)
Likes: 0
Liked 1 Time in 1 Post
DA 9000 v DA 7900

New (used) bike w/Dura Ace 7900 cranks/ 53-39 chain rings (Di2 shifting) 10 speed; I want to change the chain rings to Dura Ace 9000 52-36, will that be possible while NOT changing the 7900 cranks? Thank you in advance
Spookytooth22 is offline  
Old 02-11-17, 02:24 AM
  #2  
Senior Member
 
Join Date: Oct 2007
Location: West Yorkshire, United Kingdom
Posts: 5,773
Mentioned: 5 Post(s)
Tagged: 0 Thread(s)
Quoted: 453 Post(s)
Liked 104 Times in 87 Posts
No, as they are a totally different bolt pattern/number of bolts
jimc101 is offline  
Old 02-11-17, 05:55 AM
  #3  
Senior Member
 
Join Date: Jan 2015
Posts: 443
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 131 Post(s)
Likes: 0
Liked 21 Times in 17 Posts
7900 is a 5-arm spider. 9000 is a 4-arm spider. So not compatible.
trailflow1 is offline  
Old 02-11-17, 06:09 AM
  #4  
Senior Member
 
Join Date: Oct 2007
Location: West Yorkshire, United Kingdom
Posts: 5,773
Mentioned: 5 Post(s)
Tagged: 0 Thread(s)
Quoted: 453 Post(s)
Liked 104 Times in 87 Posts
There are plenty of non-Shimano options for chainrings, TA, WickWerks, Rotor, SRAM, FSA, Stronglight to start with, but would look at the cost of this vs a complete crank.

Would also be looking for what to replace you groupset with incase anything fails, as 10 speed DI2 isn't supported anymore/spares are hard to find/very expensive
jimc101 is offline  
Old 02-11-17, 09:11 AM
  #5  
Member
Thread Starter
 
Join Date: Jun 2015
Posts: 37
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 3 Post(s)
Likes: 0
Liked 1 Time in 1 Post
Got it. Thank you both for the responses.
Spookytooth22 is offline  
Old 02-11-17, 11:41 AM
  #6  
Senior Member
 
alcjphil's Avatar
 
Join Date: Jun 2002
Location: Montreal, Quebec
Posts: 5,930
Mentioned: 16 Post(s)
Tagged: 0 Thread(s)
Quoted: 1819 Post(s)
Liked 1,696 Times in 976 Posts
Originally Posted by trailflow1
7900 is a 5-arm spider. 9000 is a 4-arm spider. So not compatible.
Not only that. A 53-39 Dura Ace 7900 crank would have a 130 mm BCD. There is no possible way to get a 36 tooth small chainring for it,doesn't matter what aftermarket brand you choose
alcjphil is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
hcgaloi
Bicycle Mechanics
2
07-20-19 01:40 AM
fishboy316
Classic & Vintage
18
02-02-19 06:59 PM
bt
Road Cycling
13
06-27-13 06:30 AM
sinorev
Road Cycling
0
06-26-12 11:17 AM
surgeonstone
Road Cycling
76
11-01-10 03:44 PM

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service -

Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.