I weigh 280 lbs, and have driven my Cranbrook HARD for two years, over every bumpy road you can imagine. Never had an issue with the frame. If you want something to just put together and leave it alone for not a lot of money, perhaps a Micargi frame is not a bad choice. My next build is not going to be on something from Walmart though. Vintage Schwinn cantilever frame (most likely American, skinny frame with very thick walled tubing, down tube looks to have a quarter inch thick wall, I can tell due to a notch that was cut in it by the previous owner), and a 49cc Lifan 4 stroke. I'm done with owning a bike I have to fix all the time, and no matter what bike you own, if its got a happy time motor in it, you'll spend as much time working on it as you will riding it. I'm done with all that.