Go Back  Bike Forums > Bike Forums > Classic & Vintage
Reload this Page >

How do you measure BCD's?

Search
Notices
Classic & Vintage This forum is to discuss the many aspects of classic and vintage bicycles, including musclebikes, lightweights, middleweights, hi-wheelers, bone-shakers, safety bikes and much more.

How do you measure BCD's?

Thread Tools
 
Search this Thread
 
Old 07-22-12 | 11:58 AM
  #1  
owenmyers's Avatar
Thread Starter
Senior Member
 
Joined: Jul 2011
Posts: 374
Likes: 1
From: Huntington beach

Bikes: Fondriest, 86 Team Fuji

How do you measure BCD's?

I have so many chainrings i need to get rid of, and many of you need the right BCD's. How do you measure them correctly?
owenmyers is offline  
Reply
Old 07-22-12 | 12:01 PM
  #2  
mikemowbz's Avatar
Senior Member
 
Joined: Aug 2011
Posts: 1,324
Likes: 80
From: Vancouver, BC

Bikes: Are several.

https://sheldonbrown.com/gloss_bo-z.html
mikemowbz is offline  
Reply
Old 07-22-12 | 12:05 PM
  #3  
stevenc's Avatar
Senior Member
 
Joined: Jun 2009
Posts: 178
Likes: 2
From: Ghent - Belgium

Bikes: Eddy Merckx MX Leader "Vive le Roy", Flanders Pista, Poggio Shimano 600 10-speed

I use a Specialties TA packaging carton, it has a BCD schema on the back, very easy. Just overlay the ring.
Sheldon has a good list: https://sheldonbrown.com/cribsheet-bcd.html measure the distance between two holes center-to-center. You need to be precise as a few mm makes a different BCD.
stevenc is offline  
Reply
Old 07-22-12 | 12:39 PM
  #4  
stevenc's Avatar
Senior Member
 
Joined: Jun 2009
Posts: 178
Likes: 2
From: Ghent - Belgium

Bikes: Eddy Merckx MX Leader "Vive le Roy", Flanders Pista, Poggio Shimano 600 10-speed

you beat me to it, mikemowbz!
stevenc is offline  
Reply
Old 07-22-12 | 01:01 PM
  #5  
mikemowbz's Avatar
Senior Member
 
Joined: Aug 2011
Posts: 1,324
Likes: 80
From: Vancouver, BC

Bikes: Are several.

Originally Posted by stevenc
you beat me to it, mikemowbz!
I can be very succinct
mikemowbz is offline  
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
mapleleafs-13
Classic & Vintage
16
12-12-14 02:20 PM
justinzane
Bicycle Mechanics
12
10-17-14 08:47 AM
leeinmemphis
Bicycle Mechanics
8
05-06-13 07:39 PM
jonwvara
Classic & Vintage
11
02-10-13 06:14 PM
top506
Classic & Vintage
4
10-23-11 09:16 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 © 2026 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.