Originally Posted by
cyccommute
Did you not notice how the gap on both lift pins on the smaller ring are about the same width of a gap? They look relatively identical to me. The one on the outer ring may be smaller because it is on the outer ring or it may be a perspective issue. The larger ring’s lift pin is mostly out of the frame of the picture.
Kmeyer93’s rings aren’t don’t look very worn at all. Not sure what you are trying to say, however. So you’ve found a ring that has the same pins but they aren’t by design?
Please quit trying to stretch every response into a lengthy discussion, and adding pointed false assumptions. Thanks.
the rings shown by Kmeyer93 appear to be identical to the nearly un-used ones i have here, except for obvious wear on many of K's rings' teeth... which isn't super-bad wear, but still quite obvious, if you know what to look for. PS.. that wear varies from tooth to tooth, making it not as obvious to untrained eyes.
look closely.. you'll see that the rings bolt up at a very small BCD.. just like the early Shimano MTB alivio crankset i have in stock.
those alivio cranksets had a Decal on the outer face of the arms that got wiped off most of them by shoe rub.
there is no Shimano parts Code on the back of the arms.
the mid and big ring have a few "W Cut" teeth, meaning they a tiny bit shorter, and are flat on top, until they wear some after a few thousand shifts....
the W Cut teeth are not adjacent to the cheap stamped shift "pins".
obvious conclusion: i have the un-worn version here to look at now, from any angle i choose.
Ideally, the worn rings should be replaced, but are not critical at this time.
that BCD has never been covered by the aftermarket in this century, and Sheldon never recorded that BCD.
When Replacement is Needed, just Install a newer design crankset, with more modern, better shifting.
break's over.. back to work on a fairly well preserved K2 ZED MTB.