getting a bike online...
Okay, there's no place to buy one nearby, and I don't have a car. so basically, i'm stuck with trusting everything i've read, and based on all that i plan on getting a trek 520. So, I'm basically stuck buying it online, which means that I can't try it out for size beforehand. How can i figure out what size of bike I should look for without being able to get near one?