Originally Posted by
Michael Angelo
The A and B position are for different range freewheels. I was commenting about 7 Speed Freewheels and Syncro II inserts. I know the confusion, it's terrible. No wonder Shimano SIS ruled in sales.
Yes, but the way the A and B worked, was to switch from a 5 deg slant parallelogram to a 30 deg slant parallelogram; in either mode it was the first slant parallelogram produced by Campagnolo (the 1st and 3rd generation Rallys had a drop parallelogram, but the slant was 0 deg).