Just to note the difference, 2 distinct camps of chain design, now a days.

a bushingless chain just makes part of the bushing the roller sits on, by punching it in
when the holes in the inner link are made .

the colored chains shown are bushingless. only the edges of the roller have support,
the pin supports the other side, of the edge bush, but the roller does not contact that.

a full bushing chain has a wee sleeve pressed in and so the whole roller is riding on the bushing,
so there is more surface to spread the wear over, and it will wear longer .


Bushingless chains came on when the side flexibility was desirable for derailler systems ,
that went past 6 speeds , but for a single speed drivetrain a Full Bush Chain is better.

Of course not needing to make all those little bushing tubes is a cost, and so those chains are disappearing ..

As once the punching machine is bought, it lowers manufacturers production costs.