167.5 for small riders, 170 is pretty well standard.
I like 175 on the mt. bike for more grunt pushing up steep hills.
167.5 feel like rideing a windmill, you realy would not like them.
Besides forget about these high cadence freaks and ride what is comfortable for you, I havent worried about it since i quit raceing.
And i could top out on a egerometer at 160 +
Steve.