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

Compatibility of Shimano 5703 chainring on 5603 crank ....

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.

Compatibility of Shimano 5703 chainring on 5603 crank ....

Old 12-28-15, 12:29 PM
  #1  
Senior Member
Thread Starter
 
Join Date: Sep 2009
Posts: 936
Likes: 0
Liked 1 Time in 1 Post
Compatibility of Shimano 5703 chainring on 5603 crank ....

Just a sanity check here before I place an order. It's my understanding that I can replace a worn middle 5603 39T chainring with a new 5703 39T chainring, and it would be 100% compatible. Can anyone confirm? Also, what exactly is the difference between the two cranksets, besides the larger BCD on the 30T chainring (on the 5703).
lineinthewater is offline  
Old 12-28-15, 01:35 PM
  #2  
Senior Member
 
Join Date: Aug 2005
Location: Pittsburgh, PA
Posts: 33,656

Bikes: '96 Litespeed Catalyst, '05 Litespeed Firenze, '06 Litespeed Tuscany, '20 Surly Midnight Special, All are 3x10. It is hilly around here!

Likes: 0
Liked 1,099 Times in 745 Posts
The 5603 and 5703 chainrings should be interchangeable. Also, the 5703 crank still has the separate 74 mm bcd for the granny ring, just like the 5603 so there is no difference there either. The series number change seems to accompany the change from external shift cable routing to under the bar tape routing but the cranks themselves remained the same.

The larger 92 mm bcd on some of Shimano's other road triple cranks (FC-4603 and FC-6703) is actually on tabs on the middle chainring and not on the crankarm itself so a 30T chainring is the smallest that will fit. The 5703 is the one of last of the old separate granny bolt circles.
HillRider is offline  
Old 12-28-15, 02:05 PM
  #3  
Senior Member
Thread Starter
 
Join Date: Sep 2009
Posts: 936
Likes: 0
Liked 1 Time in 1 Post
Originally Posted by HillRider
The 5603 and 5703 chainrings should be interchangeable. Also, the 5703 crank still has the separate 74 mm bcd for the granny ring, just like the 5603 so there is no difference there either. The series number change seems to accompany the change from external shift cable routing to under the bar tape routing but the cranks themselves remained the same.

The larger 92 mm bcd on some of Shimano's other road triple cranks (FC-4603 and FC-6703) is actually on tabs on the middle chainring and not on the crankarm itself so a 30T chainring is the smallest that will fit. The 5703 is the one of last of the old separate granny bolt circles.
Thank you for the info. So I guess it was a minor aesthetic change, and they needed to update the series number so people didn't get confused.

Sorry about posting incorrect info on the small ring BCD change; I read it on one of the forums. Maybe I was reading too fast.
lineinthewater is offline  
Old 12-28-15, 07:45 PM
  #4  
Senior Member
 
Join Date: Mar 2010
Location: City of Brotherly Love
Posts: 1,562

Bikes: Raleigh Companion, Nashbar Touring, Novara DiVano, Trek FX 7.1, Giant Upland

Likes: 0
Liked 0 Times in 0 Posts
The parts lists says that the granny ring from the 5703 is compatible with the 5603. I'd expect all of them to be compatible but the middle and outer ring have some styling that changes so they aren't listed as compatible.
Bezalel is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Robnhood1952
Bicycle Mechanics
9
10-21-14 06:58 PM
ricebowl
Bicycle Mechanics
4
11-16-12 12:44 AM
marcpro
Classic & Vintage
4
02-23-12 08:54 PM
JiveTurkey
Bicycle Mechanics
7
02-14-12 01:50 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


Thread Tools
Search this Thread

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

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