sheesh.

The 19 vs. 22mm refers to the bottom bracket spindle size, ie. .THE INNER DIAMETER OF THE BEARING!!!

The outer diameter is the same.. meaning, if you use a 19mm spindle in a mid bb shell, your bearings will be bigger than if you use a 22mm spindle in a mid bb.

However, now that I've looked at the S&M website, they only show a 19mm spindle mid crank/bb set.

http://www.gsportbmx.co.uk/support/r...ompendium.html
http://www.gsportbmx.co.uk/support/r...s%20again.html