The Zerich would fit my 16-22T cogs fine. The 22T was all the way to the front and very little room for tire clerance on frame. I am now on SRAM SS PG-1 chain and when cut to same number of links as my previous one, it fits my 16-19 just fine. But if I want 20-22, I have to add two links. No biggie on the SRAM SS since it comes with a quick release.