Here is my story.

I have been riding some of my friend's fixed bikes for a while, but I just recently decided to buy my own bike. Someone I know was selling their barely ridden 07 KHS Flite 100 for $400, so I decided to take it off of their hands. I have been riding this bike for about 2 weeks, and last night while I was riding I felt the left pedal slant downwards a little. I started to slow down, because it felt like it was about to fall of. As I was slowing down, the pedal came right out of the crank arm. Upon inspection, I found that the pedal stripped completely out of the crank. I was literally peeling the threading of the arms off of my pedals! WTF?!?

Maybe it was the pedals? I don't think so though...

Anyone know where I can buy a replacement crank arm?

If this isn't possible, I am looking in to buying a completely new cranks set, so I need your help on deciding what to buy. The IRO cranks seem like a good deal for the price..

I need a fairly cheap, quick replacement, so any suggestions are needed.

Thanks
Rob