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  1. #1
    Waiting for his CX YungBurke's Avatar
    Join Date
    Jul 2008
    Location
    Atlanta, Georgia; Lewisburg Pennsyvania
    My Bikes
    Jamis Satellite, Motobecane Fantom Cross UNO, Fuji Team singlespeed
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    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?
    Revised Stable:
    2008 Jamis Satellite- Fast road, racing, club rides, touring
    2009 Motobecane Fantom CX UNO- singletrack, fire roads, touring, urban riding
    1982 Fuji Team Singlespeed- dad's ride, coffee shop, screwing about

  2. #2
    Senior Member Homebrew01's Avatar
    Join Date
    Jul 2004
    Location
    Ffld Cnty Connecticut
    My Bikes
    Old Steelies I made, Old Cannondales
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    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.
    Bikes: Old steel race bikes, old Cannondale race bikes, less old Cannondale race bike, crappy old mtn bike

  3. #3
    Rat Bastard mcoomer's Avatar
    Join Date
    Jul 2006
    Location
    Sammamish, WA
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    Cannondale Prophet, Specialized S-Works SL2, Specialized S-Works Stumpjumper
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    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.
    It's better to burn out than fade away...or slip out of your pedal and face plant on the side of the road!!!

    '06 Cannondale Prophet
    '08 Specialized S-Works Stumpjumper
    '09 Specialized S-Works Tarmac SL2

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