Originally Posted by
cny-bikeman
I have no idea what you mean by the chain being thicker. Please try to be more careful about wording if you want helpful responses. Chains have length and width, not "thickness."
It would be width I am describing, there seems to be less clearance between each adjacant cog and the chain. I was wondering if there is a big enough difference between the 2 chains (HG and IG) to be a problem or is it that the cassette may just be to worn to mesh with a new chain causing the skip. The HG Shimano chain is made for 7, 8, and 9 speed per the box.