Quote: 70/2 B/E spindles and brakes are the same. 73/4 B are different. Taller spindle, larger bearings and different caliper mounting. 73/4 E spindles are the same as 70/2 but have larger bearings. A body have shorter spindles than B and E.
When you say " 73/4 B are different. Taller spindle, larger bearings and different caliper mounting" are you referring to slider vs. pin type caliper mount?
