3/32 is not usable past 8 speed, 9 speed needs thinner chains.
OP was asking about half stepping 9 speed that is a different issue..
i dont think a 2 t chainring difference will help.. do the ratio math first.
stick a 48t on the outer for the top few gears, but it is not going to half step the 9 speed cassette..
like worked when there were 6 speeds with wider gaps to fill in between.
Last edited by fietsbob; 10-08-12 at 11:18 AM.