A mountain bike's geometry is the biggest contributing factor to how it performs. It doesn’t matter how supple your suspension is, how grippy your tires are, or how many gears you have, if the geometry isn’t up to the job your bike is going to be uncomfortable and hard to control out on the trails.
What’s more, although there are ways to manipulate the geometry of a bike, most measurements are pretty much set in stone or require some complicated workarounds to achieve the desired numbers without throwing off something else. When choosing a new bike, geometry should be one of your top considerations.
