I’ve had Walmart mongoose mtn bike 29 inch over three years. I’ve had three...all replaced “free” under warranty (about $25 for warranty when purchased)...they sent me my money and tax because no one locally is contracted to fix them. So I keepo the bikes for parts and buy a new one. I put about 5500-6000 miules ona year. I weigh about 280 so I beat the cra* out of the bikes. Cost: about $225 new. Great bikes for the price.
Have any frame failures?
Word on the street is, that most bikes are max out at 200?
At just under 200,some of my rear wheels have not lasted.
A Velocity cyclocross rim ($$) the spoke pulled a chunk of the rim out!!! Miles from home, with a crescent wrench and disconnected brake, made it in.
Yes, I have and use a tension meter.