I bought a walmart bike last summer just to see if I could ride after my knee surgeries and within a month: the crankarm was stripped, the shifters broke, both wheels were bald and split one across the sidewall, tacoed both wheels and stripped the seat clamps. All this during commuting, no off road at all. I wouldnt even buy a walmart bike for my kids after that POS. By the way, this was one of their "top end" mongoose bikes