Mountain Bike Size Chart Wheel. Please read my post regarding Mountain Bike Sizing chart here: Mountain Bike Size Chart Consider the Bike Type. Mountain Bike Effective Top Tube and Reach.
ETT is a common measurement to look at when sizing a bike and is a good indicator of how long a bike will feel while you're seated. These size labels come from an old French sizing standard, which we'll cover in more detail in the French sizing section. It's basically increasing the height of the tyre sidewall of a given wheel size to give it the roll-over traits of the next wheel size up along with a gain in tyre width to add an aggressive high-traction character.
The Blizzard is a proper mountain bike with aggressive trail geometry and massively wide tires, ensuring you're ready to ride no matter what the conditions are.
Mountain Bike Tire Size and Width.
First, consider what kind of bike you want. For example, mountain biking is a lot more aggressive than road biking and may require a smaller sized bike to make it more maneuverable through different terrains and obstacles, whereas a cross-country racing bike may be sized slightly larger to allow more speed to be generated. The wheel size is based on the diameter of the tire (see below) and as each tire size gets larger, so does the size of the bicycle frame.