Chicken's web site sez:
11,12,14,16,18,21,26,32 (PGC 532 model), or
11,13,15,18,21,24,28,32 (PGC 832 model - which is almost twice as
heavy but
six quid cheaper)

I wish.
That there were closer ratios available at the bottom end, such as
those available at the top.
Going uphill, thats when I need the smooth change not that knee
jarring jump as I get closer to the inner.
Remember that dreadful Mega which shimano brought out, close ratio
all thru then a monstrous drop onto the granny.
Mike