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  1. #1
    Gordon P
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    Miyata 1000 chainrings

    Hi, I have a 1985 Miyata 1000 and I am thinking of upgrading the chainrings. Would changing to ramped and pinned help at all? Right now I am running the original 50 42 28 and may consider changing to say 48 38 28. Does anyone have any good advice or experience in this matter?

    Thanks,
    Gordon P

  2. #2
    Savor the journey
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    Quote Originally Posted by Gordon P View Post
    Does anyone have any good advice or experience in this matter?

    Thanks,
    Gordon P
    I'm not familiar with the stock crankset (and therefore, the BCD) on the classic 1000. If the BCD is 110/74 mm, then it would be very simple to accomplish an excellent range for road touring, such as 46x36x24. BTW, there is a wealth of wisdom on vintage Miyata 1000s on a Yahoo group that specializes on, well, Miyata 1000s. Give them a shout: HERE.

    All the best,
    Ted
    Veg Cyclist

  3. #3
    Mad bike riding scientist cyccommute's Avatar
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    Quote Originally Posted by VeloVeg View Post
    I'm not familiar with the stock crankset (and therefore, the BCD) on the classic 1000. If the BCD is 110/74 mm, then it would be very simple to accomplish an excellent range for road touring, such as 46x36x24. BTW, there is a wealth of wisdom on vintage Miyata 1000s on a Yahoo group that specializes on, well, Miyata 1000s. Give them a shout: HERE.

    All the best,
    That's probably what it is. My 83 610 used a Sugino AT that was that circle. Ramped and pinned probably won't do too much but it probably won't hurt.
    Stuart Black
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  4. #4
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    Re: Miyata 1000 chainrings

    I have a Miyata 1000; I believe that it's an '84 (but the original owner wasn't quite sure). Anyway it does indeed have 110/74 BCD. This bike also came with the 50-40-28 chainrings. I have since replaced those and am running 46-34-24 rings currently. I have never had ramped chainrings on this bike so I can't comment on that.

    -- Manzanita

  5. #5
    Co-Mo mojo
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    Quote Originally Posted by Gordon P View Post
    Hi, I have a 1985 Miyata 1000 and I am thinking of upgrading the chainrings. Right now I am running the original 50 42 28 ....

    Thanks,
    Gordon P
    If you have the original chain rings and a worn out chain -- like the 1983 Specialized Expedition I am restoring -- you would be advised to replace the chain rings, chain and freewheel. Check everything for wear. New chain rings to meet your gearing needs are not a good match for the rest of the drive train if it is badly worn. The seller raved about the good condition of the bike, but I'd never seen a chain so badly worn or stretched! YMMV. I'll follow this thread to see if others weigh on on the "ramped and pinned" issue -- I've wondered that myself.

    As in other replies, a 110/74 BCD opens the door for lots of replacement chain rings on the market, readily available. Mine originally came with 48-44-26, an odd but apparently common combination on both the Expeditions and Miyata 610 / 1000's.

    Good luck!

    Steve

  6. #6
    Mad bike riding scientist cyccommute's Avatar
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    Quote Originally Posted by DBC Steve View Post
    As in other replies, a 110/74 BCD opens the door for lots of replacement chain rings on the market, readily available. Mine originally came with 48-44-26, an odd but apparently common combination on both the Expeditions and Miyata 610 / 1000's.

    Good luck!

    Steve
    I'm not sure I agree on the 48/44/26 as being original on the Miyatas. I had a 610 from 83 and the rings were 52/40/26. Typical touring freewheels were 14-32 for that era and, with a 48 tooth outer, you'd have a 92" high gear...pretty low.
    Stuart Black
    Solo Without Pie. The search for pie in the Midwest.
    Picking the Scablands. Washington and Oregon, 2005. Pie and spiders on the Columbia River!
    Days of Wineless Roads. Bed and Breakfasting along the KATY
    Twisting Down the Alley. Misadventures in tornado alley.
    An Good Ol' Fashion Appalachian Butt Whoopin'.

  7. #7
    Gordon P
    Guest
    Thanks for the replies. The chainrings, chain and back cluster are all in new shape and of good quality so I have no reason to replace them. I saw some good quality ramped and pinned chain rings recently so I was wondering if there would be some improvement in shifting. I also have an older mtb I use for touring/commuting and need to up grade the chainrings on this bike as well. I'm going to post in the Miyata Group mentioned above and repost in the Mechanical forum.
    Regards,
    Gordon p

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