Old cassette + new chain = skip, but only on granny?
08-26-16, 09:09 AM
#1
Senior Member
Thread Starter
Old cassette + new chain = skip, but only on granny?
Anybody else had this happen?
The old chain was pretty toasty (according to my Park chain gauge), so I was expecting issues. But this is a new one - it only skips in back when I'm on the small (26t) ring. Doesn't matter which cog. Mystifying.
SP
OC, OR
The old chain was pretty toasty (according to my Park chain gauge), so I was expecting issues. But this is a new one - it only skips in back when I'm on the small (26t) ring. Doesn't matter which cog. Mystifying.
SP
OC, OR
08-26-16, 11:27 AM
#3
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08-26-16, 11:35 AM
#4
Nigel
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More possibilities (all wild ass guesses):
* RD's spring is tired.
* RD is slightly gummed up/dirty.
* RD indexing is more bias towards the outer ring.
* worn chain was more flexible than the new one.
* RD's spring is tired.
* RD is slightly gummed up/dirty.
* RD indexing is more bias towards the outer ring.
* worn chain was more flexible than the new one.
08-27-16, 01:03 AM
#10
Senior Member
It's because your cassette teeth and or granny are worn down. Put the old chain back on and replace all the worn drive parts at the same time and in the future be more vigilant about replacing worn chains. Or just ignore the issue, but the old cassette and granny will cause premature wear of the new chain. The unmatched wear issue usually manifests on the smaller cogs/rings.
Last edited by Clem von Jones; 08-27-16 at 01:15 AM.
08-27-16, 01:14 AM
#11
Full Member
I've once installed three chains on a Shimano 6500 cassette at 2,500 intervals. I was pretty meticulous about maintaining the chains and cassette. The fourth chain install started to skip at about 300 miles. I had to junk the newish chain and cassette at that point.
Now I use two chains to one cassette and haven't had any issues. I've heard of some people who replace cassette whenever they do a new chain.
Now I use two chains to one cassette and haven't had any issues. I've heard of some people who replace cassette whenever they do a new chain.
08-27-16, 10:58 AM
#12
working on my sandal tan
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Got any pictures of the granny ring? Sometimes the skip actually happens up front.
