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  1. #1
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    crank recommendations

    Just bought a 1991 Miyata 1000 LT. It's got a biopace crank on it w/ gearing way higher than what I could handle on a loaded bike. I'd like to get something like a 22-32-44 set of rings. What kind of crank would that be? I'm only familiar w/ road cranks and they're 110-74 BCD so the smallest ring I've ever had is a 24t. Any crank recommendations out there for low gearing?

    thanks!

  2. #2
    Mad bike riding scientist cyccommute's Avatar
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    Quote Originally Posted by erbfarm View Post
    Just bought a 1991 Miyata 1000 LT. It's got a biopace crank on it w/ gearing way higher than what I could handle on a loaded bike. I'd like to get something like a 22-32-44 set of rings. What kind of crank would that be? I'm only familiar w/ road cranks and they're 110-74 BCD so the smallest ring I've ever had is a 24t. Any crank recommendations out there for low gearing?

    thanks!
    Get a Shimano LX Hollowtech II (external bearing) like this one. Look around before you buy however. This isn't necessarily the best price. Dead easy to install and repair on the road.
    Stuart Black
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  3. #3
    nun
    nun is online now
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    I'd look at a TA Carmina 94x58 triple

  4. #4
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    I'll second the Shimano crankset with the external BB, you can also get the new Deore crankset with external BB now if you're on a budget. I installed a set on a bike today and they seemed pretty decent for the money.

  5. #5
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    The Shimano Hollowtech says it's 9 spd, I've only got a 7 spd freewheel, is that going to throw anything off? And since the BB is integrated, will it fit my 1991 BB shell? or does it require a larger size?
    Last edited by erbfarm; 09-07-08 at 07:17 AM.

  6. #6
    Mad bike riding scientist cyccommute's Avatar
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    Quote Originally Posted by erbfarm View Post
    The Shimano Hollowtech says it's 9 spd, I've only got a 7 spd freewheel, is that going to throw anything off? And since the BB is integrated, will it fit my 1991 BB shell? or does it require a larger size?
    The 7/9 speed shouldn't make any difference. The 9 speed has slightly thinner rings but that shouldn't matter. Your bottom bracket is probably a 68mm (fairly standard for quite a while). Just measure it. Even if it is a 73mm, there are spacers to adjust for the difference.
    Stuart Black
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    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
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    Shimano M460 crank.44-32 22 gearing,Hollowtech arms,steel gears on the middle and granny,pins and ramps if you need them,squareBB so you have lots of BB's to choose from for a good chainline.Cost around $80w/BB.This crank does not belong in any of the "groups".It's a stand alone crank that Shimano makes that alot of people don't know about.

    Was going to buy one myself but decided to install a 20 tooth gear on my old SR triple instead,even though it's suppose to only take 24 tooth.I changed the BCD from 74 to 58.
    Last edited by Booger1; 09-08-08 at 01:16 PM.
    Everything should be as simple as possible...But not more so.---Albert Einstein

  8. #8
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    Quote Originally Posted by Booger1 View Post
    Was going to buy one myself but decided to install a 20 tooth gear on my old SR triple instead,even though it's suppose to only take 24 tooth.I changed the BCD from 74 to 58.

    how did you chance the BCD from 74 to 58?

  9. #9
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    I own an automotive machine shop,so I have mills and lathes and tig welders.

    I didn't use any of them though.....

    It's just a ring with 5 bolt holes at 74 BCD and 5 bolt holes at 58 BCD.My crank used spacers between the gear seat and the gear,so I made the plate the same thickness as the spacers and bolted the gear to it.Spaces it the same as the one I took off.
    Last edited by Booger1; 09-15-08 at 08:55 PM.
    Everything should be as simple as possible...But not more so.---Albert Einstein

  10. #10
    cyclopath vik's Avatar
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    square taper BB's and cranks work very well, last a long time, are cheap and you can find them even in less technologically sophisticated parts of the world.

    When I built up my last touring bike I used a Shimano square taper BB [~$30 @ the LBS] and a Deore MTB crank [~$40 @ LBS] - probably the model noted by Booger1 poster above. You ca probably get them a lot cheaper if you do the EBay thing.
    safe riding - Vik
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