>>1484385>is getting a wrong sized bike that important for these type of rigid mtbs?some rambling:
my rocky mt came in 17, 18.5, 20 & 21.5" sizes, centre to top, (small, medium, large, x large)
and 55.9, 57.2, 58.4, 59.7cm top tubes respectively
this one's a large
i'm 6'2 and ideally should have an xl
with the stock seatpost maxed out and a riser bar, it's good, good for riding hard for a few hours too, not just beater good.
Slightly undersized bikes are pretty fun to ride really, i'd even consider recommending it, especially with steel where you drop a bit of weight sizing down. And if you're tall it's nice having your cheap-ish bike be able to fit a wider spectrum of people.
having a shorter wheelbase when you're tall and stretched out over it though, also makes a bike inherently more sketchy, both for technical riding and just grinding out miles. It feels (and is) more like you're going to flip it over. I think it's true for road bikes as well. You can get the bars in the same position with a longer/taller stem but moving the axis of steering forward of the axle makes it less stable.
For a utility bike with meme bars and stuff or just a beater it's kind of the tank feeling (a larger size) vs the kids bike/ bmx feeling. Any size really can be fun for a while. If you found something really cool that really doesn't fit you, still, fuck it, could be fun. Hell i've got a tiny rockhopper and even that is fun to mess around on. But for a bike you're really gonna ride, i wouldn't go down more than 1 size, it's not worth it. Better to have something meh that fits you.