I would generally say it is the last bike I just sold.
But I did own a Marin Bear Vally rigid MTB for a while, and it was brutal. I was also a bit of a newbie, and pumped my tires up to the MAX pressure, caus that's what the tire said. I blame my back issues on that bike! Or possibly the other 500 things that my chiropractor said I've done that I shouldn't have done...
