> Which means chains are a little thinner As I understand it, chain stretch is not due to the links stretching. Instead it happens because the rollers wear dow

> Which means chains are a little thinner As I understand it, chain stretch is not due to the links stretching. Instead it happens because the rollers wear down and get thinner. And I don't see any reason the rollers need to be different on 10/11/12 speed chains. So if newer chains wear faster, isn't it something else like materials?