Advertise on Bikeforums.net



User Tag List

Results 1 to 13 of 13
  1. #1
    Senior Member
    Join Date
    Apr 2008
    Location
    Chicago, IL
    My Bikes
    Vintage Miele
    Posts
    713
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Campy chainrings on Shimano Crank?

    Hi,

    I have a 135bcd shimano dura ace crankset, and since campy's chainrings are all 135bcd, I'm wondering if its normal and kosher to put campy chainrings on this crank? Would there be any compatibility issues?

    Thanks,
    Brian

  2. #2
    Senior Member
    Join Date
    Aug 2005
    Location
    Pittsburgh, PA
    My Bikes
    '''96 Litespeed Catalyst, '05 Litespeed Firenze, '06 Litespeed Tuscany, '12 Surly Pacer, All are 3x8,9 or 10. It is hilly around here!
    Posts
    25,599
    Mentioned
    6 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by krems81 View Post
    I have a 135bcd shimano dura ace crankset....
    Thanks,
    Brian
    Are you very sure about the BCD on those Dura Ace chainrings? Every Shimano outer and middle road chainring and crank I've ever seen has a bcd of 130mm except the compact rings which are 110 mm. I've never seen any Shimano cranks with a 135 mm bcd.

  3. #3
    Senior Member
    Join Date
    Dec 2005
    Location
    Auld Blighty
    My Bikes
    Early Cannondale tandem, '99 S&S Frezoni Audax, '65 Moulton Stowaway, '52 Claud Butler, TSR30, Brompton
    Posts
    2,180
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Shimano has never produced a 135 BCD crank.

  4. #4
    Senior Member
    Join Date
    Apr 2008
    Location
    Chicago, IL
    My Bikes
    Vintage Miele
    Posts
    713
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Interesting. I will have to remeasure. Thanks.

  5. #5
    In beaurocratic limbo urbanknight's Avatar
    Join Date
    Mar 2006
    Location
    Los Angeles, CA
    My Bikes
    Specialized Allez, K2 Razorback
    Posts
    22,457
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by krems81 View Post
    Interesting. I will have to remeasure. Thanks.
    Or if you have chainrings on the crankset right now, see if the BCD is stamped like it usually is.

  6. #6
    Junior Member
    Join Date
    Feb 2007
    Location
    New Hampshire
    Posts
    9
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Since their introduction in the early 1970s Dura Ace cranks have had 130mm bolt circle chainrings. There is not now nor has there ever been any 135mm Shimano chainring.

  7. #7
    Senior Member
    Join Date
    Aug 2005
    Location
    Pittsburgh, PA
    My Bikes
    '''96 Litespeed Catalyst, '05 Litespeed Firenze, '06 Litespeed Tuscany, '12 Surly Pacer, All are 3x8,9 or 10. It is hilly around here!
    Posts
    25,599
    Mentioned
    6 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by urbanknight View Post
    Or if you have chainrings on the crankset right now, see if the BCD is stamped like it usually is.
    I'm not sure about every maker but I know neither Campy nor Shimano stamp the bcd on their chainrings. The rings are engraved with the maker's name, the tooth count and, more recently, whether for 9 or 10-speed but no bcd value.

    If you are not sure, you have to measure the distance between bolt holes carefully and look up or calculate the bcd from that.

  8. #8
    40 something and counting forensicchemist's Avatar
    Join Date
    Nov 2004
    Location
    dallas/ft.worth texas
    My Bikes
    Colnago,Tsunami, Kestrel, Univega
    Posts
    421
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    and if I recall, Campy 130 BCD is not the same as Shimano 130 BCD: 1 bolt is slightly offset on the Campy making you use only campy chainrings.....

  9. #9
    Senior Member
    Join Date
    Aug 2005
    Location
    Pittsburgh, PA
    My Bikes
    '''96 Litespeed Catalyst, '05 Litespeed Firenze, '06 Litespeed Tuscany, '12 Surly Pacer, All are 3x8,9 or 10. It is hilly around here!
    Posts
    25,599
    Mentioned
    6 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by forensicchemist View Post
    and if I recall, Campy 130 BCD is not the same as Shimano 130 BCD: 1 bolt is slightly offset on the Campy making you use only campy chainrings.....
    Right idea but the wrong details. Campy does not, and AFAIK has never has made 130 mm bcd chainrings.

    What you are thinking of is Campy's compact cranks with a nominal 110 mm bcd. Campy made the bolt circle 110 mm like everyone else BUT offset one bolt a bit so their rings wouldn't fit on any other 110 mm crank and no other 110 mm chainrings would fit on a Campy compact crank. Cute huh?

    Again, IIRC, they only did this for the Record and Chorus compact cranks. Centaur, etc. did use a standard 110 mm bcd and would accept other makers rings.

  10. #10
    Senior Member
    Join Date
    Jul 2003
    Location
    Brooklyn, NY
    Posts
    1,453
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    The only other manufacturer that commonly uses 135mm BCD is Miche.

  11. #11
    40 something and counting forensicchemist's Avatar
    Join Date
    Nov 2004
    Location
    dallas/ft.worth texas
    My Bikes
    Colnago,Tsunami, Kestrel, Univega
    Posts
    421
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by HillRider View Post
    Right idea but the wrong details. Campy does not, and AFAIK has never has made 130 mm bcd chainrings.

    What you are thinking of is Campy's compact cranks with a nominal 110 mm bcd. Campy made the bolt circle 110 mm like everyone else BUT offset one bolt a bit so their rings wouldn't fit on any other 110 mm crank and no other 110 mm chainrings would fit on a Campy compact crank. Cute huh?

    Again, IIRC, they only did this for the Record and Chorus compact cranks. Centaur, etc. did use a standard 110 mm bcd and would accept other makers rings.
    Yea, thats what it is.....thanks HillRider....I knew there was something there, just not positive what it was. Thanks for clearing it up...

  12. #12
    Newbie To Today
    Join Date
    Apr 2008
    Location
    Harahan, LA
    My Bikes
    SR Prism (1990), B'stone XO-1, Libertas Mann (1970's)
    Posts
    8
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by forensicchemist View Post
    and if I recall, Campy 130 BCD is not the same as Shimano 130 BCD: 1 bolt is slightly offset on the Campy making you use only campy chainrings.....
    Heard the same, but don't remember from where. One of the holes is millimeters shy of a perfect bolt circle.
    There are lots of things worth doing that are no way to make a living. --K. Vonnegut

  13. #13
    40 something and counting forensicchemist's Avatar
    Join Date
    Nov 2004
    Location
    dallas/ft.worth texas
    My Bikes
    Colnago,Tsunami, Kestrel, Univega
    Posts
    421
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by spin-n-grin View Post
    Heard the same, but don't remember from where. One of the holes is millimeters shy of a perfect bolt circle.
    Re-read Hillriders post...he's got it right.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •