Cycling and bicycle discussion forums. 
   Click here to join our community Log in to access your Control Panel  


Go Back   > >

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.

User Tag List

Reply
 
Thread Tools Search this Thread
Old 06-18-02, 12:42 PM   #1
bertsot
Junior Member
Thread Starter
 
Join Date: May 2002
Bikes:
Posts: 16
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
600 Chainring replacement

I currently have a Shimano 600 double crankset with 53/42 chainrings. I want to change the 42 to a 39. Will an Ultegra chainring fit? Or does anyone know where I can buy one for the 600 crank?

Thanks in advance

Albert
bertsot is offline   Reply With Quote
Old 06-18-02, 01:11 PM   #2
ljbike
Senior Member
 
Join Date: Jul 2000
Bikes:
Posts: 1,049
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Your LBS should have a chart to measure the hole pattern on the 600. I thin, but am not certain, that it is 130mm. But you also have to match the number of bolt holes 4, 5 or 6. Most Shimano's, are 5, but they do have 4.

So, IF the size and bolt hole pattern is the same as Ultegra, it will fit. In fact, any chainring with the same size and bolt hole pattern will fit. The thing to remember is to keep the Spacing Between the chainrings the same for proper shifting.
__________________
ljbike
ljbike is offline   Reply With Quote
Old 06-18-02, 06:43 PM   #3
Rural Roadie
RetroGrouchWrench
 
Rural Roadie's Avatar
 
Join Date: Mar 2002
Location: Central Iowa
Bikes: Schwinn's: World Voyager, Tempo, 754, 594, 2 Travelers, Mesa Runner, and a few cheepies.
Posts: 279
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
The model number on the back should read FC-6207, at least thats what my nos 600 EX crank says on it, even the FC-6400 series cranks should be 130 bolt circle diameter if its a double.
Hope this helps.
kev
Rural Roadie is offline   Reply With Quote
Old 06-18-02, 07:34 PM   #4
John E
feros ferio
 
John E's Avatar
 
Join Date: Jul 2000
Location: www.ci.encinitas.ca.us
Bikes: 1959 Capo; 1980 Peugeot PKN-10; 1981 Bianchi; 1988 Schwinn KOM-10;
Posts: 16,943
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 35 Post(s)
If your crankset is less than 20 years old, it will have the standard 130mm BCD, and the 39-tooth ring will mount onto the spinder. Your biggest concerns will be shifting in front with the larger jump, and the ability of your rear derailleur to take up the slack in back. If you have only 6 or 7 cogs in back, you may also pick up some redundant ratios. My suggestion: replace the 53 with a 50 when you replace the 42 with a 39.
__________________
"Early to bed, early to rise. Work like hell, and advertise." -- George Stahlman
Capo [dschaw'-poe]: 1959 Modell Campagnolo, S/N 40324; 1960 Sieger, S/N 42624
Peugeot: 1970 UO-8, S/N 0010468
Bianchi: 1981 Campione d'Italia, S/N 1.M9914
Schwinn: 1988 Project KOM-10, S/N F804069
John E is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

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



All times are GMT -6. The time now is 04:46 AM.