Originally Posted by
KCT1986
The splines are cut-away in the non-driving side. But as picture, at least 1 of the splines is full width so the sprockets can't rotate. Should not be enough force in that direction to need more that 1 full spline.
The wide spline isn't for strength. It's an orienting spline to ensure that individual sprockets are all in the same position relative to each other.
That's critical because the shift gates all have to be in the right place.
BTW there's no need to prevent sprockets from rotating back off the driving bar because it's a freehub and therefore impossible.