I bought an older 54 cm Specialized Secteur a couple of years ago as my California bike. I am (or was, I don't think I can stand that straight anymore) 5'7", so it barely fits and the 175 cranks were a bit much, so I spent 1/3 of the cost of the bike on 165 cranks. It's probably because it was one of my few Frankenbike mods that actually seem to have accomplished something, but I really like it. I still spin at what most people grind at, but it seems to be a lot easier and more comfortable, and I do think I can go farther, if not faster. 170-175 seems to be one of those standards because standards are cheaper things. Especially for the young at heart vertically challenged, I would recommend it.