changing big chain ring
08-07-08 | 10:02 PM
#1
Thread Starter
Waiting for his CX
Joined: Jul 2008
Posts: 452
Likes: 1
From: Atlanta, Georgia; Lewisburg Pennsyvania
Bikes: Jamis Satellite, Motobecane Fantom Cross UNO, Fuji Team singlespeed
changing big chain ring
Hey, im planning on changing my big chain ring this weekend from a 48 t worn out one to a relatively new 52t I had laying around. I vaguely remember hearing that the front DR should be ~2mm above the ring, but is this the top of the DR or the bottom?
08-08-08 | 04:28 AM
#2
Super Moderator
Joined: Jul 2004
Posts: 21,987
Likes: 1,169
From: Ffld Cnty Connecticut
Bikes: Old Steelies I made, Old Cannondales
Take a look at your current setup and replicate it with your new chainring. Take a picture to help remind you. The 2mm you're referring to is the space between the very top of the tooth and the bottom of the cage.
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Bikes: Old steel race bikes, old Cannondale race bikes, less old Cannondale race bike, crappy old mtn bike.
FYI: https://www.bikeforums.net/forum-sugg...ad-please.html
08-08-08 | 07:59 AM
#3
Rat Bastard
Joined: Jul 2006
Posts: 1,504
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From: Sammamish, WA
Bikes: Cannondale Prophet, Specialized S-Works SL2, Specialized S-Works Stumpjumper
Shift your front der to the large chainring then take a penny and stick it into the front of the derailleur between the bottom of the der cage and the chainring teeth. It should just fit and be pretty snug. Don't forget to check that you keep the derailleur cage parallel to the rings if you have to make any adjustments.
