Mrs. Herbie did not worry about speed until her 2nd marathon, and even then did only limited speed work. She does more now, but she has been at it for a few years.

VV - you would like her spreadsheet. It tracks miles on various shoes as well as time, pace, and all sorts of other nerdy runnerpantz stuff.

Here is her January shoe wear....

Shoe Mileage Totals
Brooks Infinity 29.41
Brooks Ravenna orange 27.63
Brooks Launch 0
Brooks Ravenna 64.58
Nike Equalon 0