Originally Posted by Ken Cox

I presently ride a 53t biopace.
I can only find a 52t and a 42t biopace ring in 130mm, and those don't make a lot of sense to me.

As for the cogs, I like prime numbers for no special reason other than personal preference.
17, 19, 43, 47, 53

I don't seem to have as big a choice of 3/32's chain rings in 130mm as I do in 144mm.

If it appears to dutret as though I have not thought this sufficiently through, I remain open to his advice.