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  1. #1
    i'll probably break it 91MF's Avatar
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    144bcd chainring help

    so my bike is a mix and match of parts and i have an ofmega crankset that i want to use. its 144bcd so i need 144bcd chainrings, simple right? except i'd like a 41t[hard to find - i know campy had them back when] and a 50t or 51t that will be compatible with an 8-speed drivetrain...
    is there any companies out there making custom chainrings? or am i going to have to find them on ebay or something?
    bike. throw. #MFDCR

  2. #2
    Senior Member Chombi's Avatar
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    You tell me!, 144/41T are hard to find!
    I found this one at an LBS last year after I had them dig through many drawers in their back room (many other bike shop managers just stared back at me after I asked for one and insisted that they did not exist)...

    They found it at the bottoam of the last drawer they searched in and they were almost dumbfounded when they realized 144/41T rings do exist as they never knew they had it and it was NOS!
    The ring was made by TA Specialites, from France. The one I replaced on my Mavic crank in the pic was also 41T made by Sugino which was already worn out. Really happy to find the French one to better match my Mavic, plus TA handeled the ring bolt chain interface much better than Sugino anyway. Just keep digging around you LBSs and you might also luck out and find a Campy (I've seen a very few for sale at eBay for like a 100 bucks though) or TA 41T ring too, but they might ask for a lot of money. I think I paid like $45 bucks for the TA NOS ring, but it's worth it to me!

    Chombi
    Last edited by Chombi; 11-11-10 at 12:43 AM.

  3. #3
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    I have a few made by SR sometime in the last millenium. Let me know what size you're looking for.
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  4. #4
    coprolite fietsbob's Avatar
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    TA has been good at making odd chainrings , odd tooth counts.

    They also machine a 33 tooth chainring for 110 BCD Cranks..


    I have a Campag Record 51t if you are shopping ... . [PM]


    Highpath engineering in Wales is a custom chainring maker.
    Last edited by fietsbob; 11-10-10 at 06:49 PM.

  5. #5
    Bianchi Goddess Bianchigirll's Avatar
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    I am not sure how pricy these guys are but... if you want it I am sure they will try and make it

    http://www.cycleunderground.com.au/chainringdesigns.htm
    Bianchis '87 Sport SX, '90 Proto (2), '91 Boarala 'cross, '93 Project 3, '88 Trofeo, '86 Volpe, '89 Axis, '79 Mixte SOLD, '99 Mega Pro XL Ti, '97 Ti Megatube, , '90 something Vento 603,

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  6. #6
    Senior Member
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    144 BCD is still common for track bikes in both 1/8" and 3/32" chain pitch, FSA, Sugino or Campy have a ring in the size you need and because of the price I would say Sugino then FSA or Campy. There are maybe some others I don't know about but this is what we stock because of the local bike track.

  7. #7
    Senior Member Grand Bois's Avatar
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    That is not chain pitch. That is chain width. They're both 1 inch pitch.

  8. #8
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    Quote Originally Posted by Grand Bois View Post
    <SNIP>They're both 1 inch pitch.
    Half-inch, surely.

  9. #9
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    Chain rings


  10. #10
    Old fart JohnDThompson's Avatar
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    Be aware that f you use a 41T ring on a 144mm CD arm you may need to file the ends of the spider down a little so the chain seats properly. Ofmega actually machined a little shelf on the inner part of the crank arm for that purpose (they were another supplier of 41T 144mm BCD rings):

  11. #11
    Senior Member Grand Bois's Avatar
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    Quote Originally Posted by LWaB View Post
    Half-inch, surely.
    You're right, of course.

  12. #12
    i'll probably break it 91MF's Avatar
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    Quote Originally Posted by JohnDThompson View Post
    Be aware that f you use a 41T ring on a 144mm CD arm you may need to file the ends of the spider down a little so the chain seats properly. Ofmega actually machined a little shelf on the inner part of the crank arm for that purpose (they were another supplier of 41T 144mm BCD rings):
    thanks for the tip. the cranks im using are ofmega but they do not have the little notch pictured. i suppose i'll have to modify them.
    bike. throw. #MFDCR

  13. #13
    i'll probably break it 91MF's Avatar
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    Quote Originally Posted by tomato coupe View Post
    aha. thanks
    bike. throw. #MFDCR

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