Go Back  Bike Forums > Bike Forums > Road Cycling
Reload this Page >

Changing chain rings

Search
Notices
Road Cycling “It is by riding a bicycle that you learn the contours of a country best, since you have to sweat up the hills and coast down them. Thus you remember them as they actually are, while in a motor car only a high hill impresses you, and you have no such accurate remembrance of country you have driven through as you gain by riding a bicycle.” -- Ernest Hemingway

Changing chain rings

Thread Tools
 
Search this Thread
 
Old 06-14-09, 04:15 PM
  #1  
Senior Member
Thread Starter
 
Join Date: Sep 2005
Posts: 933
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 170 Post(s)
Liked 13 Times in 7 Posts
Changing chain rings

I currently have 53-39 and 12-27. A friend of mine has a 50-34 with an 11-25. He says that he has a higher high gear and a lower low gear than I do. If I wanted, could I just change the rings on my cranks, or do I need an entire new Crankset.
Equinox is offline  
Old 06-14-09, 04:19 PM
  #2  
Batüwü Creakcreak
 
Join Date: Jan 2007
Location: The illadelph
Posts: 20,791
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 229 Post(s)
Liked 288 Times in 160 Posts
You can't put a compact (110bcd) ring on a double (130bcd) crankset.
ridethecliche is offline  
Old 06-14-09, 04:19 PM
  #3  
Keep on climbing
 
Join Date: Apr 2004
Location: Marlborough, Massachusetts
Posts: 2,193

Bikes: 2004 Calfee Tetra Pro

Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 26 Post(s)
Liked 2 Times in 1 Post
Your friend does have a higher high and lower low gear then you do.

You can't just change the chainrings; a 34-tooth ring simply won't fit on a standard double crankset (which is what you have). You need a whole new crankset.
KevinF is offline  
Old 06-14-09, 04:20 PM
  #4  
Senior Member
 
ericm979's Avatar
 
Join Date: May 2007
Location: Santa Cruz Mountains
Posts: 6,169
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
Likes: 0
Liked 1 Time in 1 Post
New crankset, with a smaller 110mm BCD. The 130mm BCD crank won't take a chainring smaller than 38t.
ericm979 is offline  
Old 06-14-09, 04:25 PM
  #5  
Senior Member
 
Join Date: Feb 2007
Posts: 711
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by Equinox
I currently have 53-39 and 12-27. A friend of mine has a 50-34 with an 11-25. He says that he has a higher high gear and a lower low gear than I do. If I wanted, could I just change the rings on my cranks, or do I need an entire new Crankset.
Ask him how often he uses the gear that is bigger than your 53x12 if you want to see him stutter.
schnabler1 is offline  
Old 06-14-09, 04:57 PM
  #6  
Senior Member
Thread Starter
 
Join Date: Sep 2005
Posts: 933
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 170 Post(s)
Liked 13 Times in 7 Posts
Thank you. What does BCD stand for?
Equinox is offline  
Old 06-14-09, 04:58 PM
  #7  
Senior Member
 
Join Date: Feb 2007
Posts: 711
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
https://www.sheldonbrown.com/gloss_bo-z.html
schnabler1 is offline  
Old 06-14-09, 05:01 PM
  #8  
Senior Member
Thread Starter
 
Join Date: Sep 2005
Posts: 933
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 170 Post(s)
Liked 13 Times in 7 Posts
Thanks again
Equinox is offline  
Old 06-14-09, 05:26 PM
  #9  
umd
Banned
 
umd's Avatar
 
Join Date: Sep 2005
Location: Santa Barbara, CA
Posts: 28,387

Bikes: Specialized Tarmac SL2, Specialized Tarmac SL, Giant TCR Composite, Specialized StumpJumper Expert HT

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 2 Times in 2 Posts
You could replace the 39 with a 38 and the 12-27 with an 11-28 and you would have a lower and higher gear than him without replacing your crank. You win!
umd is offline  
Old 06-14-09, 05:32 PM
  #10  
.....
 
Jynx's Avatar
 
Join Date: Aug 2006
Location: Long Island
Posts: 4,816

Bikes: 2006 Cannondale CAAD8

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 3 Post(s)
Likes: 0
Liked 3 Times in 3 Posts
yes he may have a lower and higher gear but you have closer spaced gears which may be more beneficial depending on the terrain.
Jynx is offline  

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.