Chain Slipping - only mid crank ring
03-15-19, 09:48 AM
#1
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Thread Starter
Chain Slipping - only mid crank ring
Hi
Ok so I reviewed past posts on chain slipping as I have it. Happens starting under medium stress and then increases with stress. I have played with this and it only happens with the mid ring (of a triple) I have been using the high and low ring to get around - but this is getting annoying
So likely mid ring replacement? This is a vintage Nishiki Colorado mountain bike with the oval track / biopace like crank. Will it be hard to find a replacement ring? - Presuming this is the issue
Thanks
Ok so I reviewed past posts on chain slipping as I have it. Happens starting under medium stress and then increases with stress. I have played with this and it only happens with the mid ring (of a triple) I have been using the high and low ring to get around - but this is getting annoying
So likely mid ring replacement? This is a vintage Nishiki Colorado mountain bike with the oval track / biopace like crank. Will it be hard to find a replacement ring? - Presuming this is the issue
Thanks
03-15-19, 10:30 AM
#2
Banned
Mid chain ring needs replacing , replace the chain at the same time...
Biopace?
Good luck , thirty years has passed, since they were discontinued , Try eBay..
...
Will it be hard to find a replacement ring?
Good luck , thirty years has passed, since they were discontinued , Try eBay..
...
Last edited by fietsbob; 03-15-19 at 10:34 AM.
03-15-19, 10:49 AM
#3
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Thread Starter
Bummer - but thanks for the confirmation.
Would it be possible to replace the entire crank with just a regular crank? I have a good co-op which allows me to do work and have access to used parts for a good price ...? Or could I just replace the mid one with a round one ?
.
Last edited by TurnerIII; 03-15-19 at 10:55 AM.
03-15-19, 12:13 PM
#4
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Bummer - but thanks for the confirmation.
Would it be possible to replace the entire crank with just a regular crank? I have a good co-op which allows me to do work and have access to used parts for a good price ...? Or could I just replace the mid one with a round one ?
Would it be possible to replace the entire crank with just a regular crank? I have a good co-op which allows me to do work and have access to used parts for a good price ...? Or could I just replace the mid one with a round one ?
03-15-19, 12:28 PM
#5
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I have had this same issue with a bio pace crank before on another bike - and after replacing the frt derailer, playing with the rear derailer , spending time and money - it never did get fixed. Finally it was stolen - good luck to them
Is this something that the biopace cranks do, something to do with me (I tend to prefer the constant pace/spin philosophy) - or just the facct that I pick old used bikes?
.
03-15-19, 12:44 PM
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It's probably just that they're old bikes. A BioPace outer ring needs a little more care in setting up the front derailleur clearance, but replacing the BioPace middle ring with a round ring of the same tooth count shouldn't affect anything.
03-15-19, 12:52 PM
#7
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Thanks for all the info !
03-15-19, 12:52 PM
#8
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Actually, there are quite a few BioPace rings for sale on Ebay at the moment. But you might as well go ahead and replace the entire crankset.
03-15-19, 01:14 PM
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If OP has a bike co-op nearby, they likely have dozens of cast off Biopace rings laying around, as the rings are frequently replaced with round ones. I know I have several I don't use.
03-15-19, 01:21 PM
#10
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Good to know - I was planning on digging through their piles tomorrow so we will see what we can find
Why dont people like the biopace rings? personal preference?
Great info all! Thanks
Last edited by TurnerIII; 03-15-19 at 01:26 PM.
