10 Micron,
Brakes will be the same for single and 2-speed rears.
The single speed rear has a 6.17 ratio.
2-speed ratio could be 5.83/7.95 or 6.40/8.72.
The ratio should be stamped on the right front face or top of the rear. Take a wire brush and start cleaning to see what you have.
Hope this helps.
Mike B
