When shopping for mountain bike tyres, the most important thing to consider is the terrain you ride most often. Loose, muddy trails call for tyres with aggressive, widely spaced knobs that clear dirt quickly, while hardpack and dry conditions suit a tighter tread pattern that rolls faster and offers more predictable cornering. Tyre width is another key factor, with wider tyres providing more grip and cushioning over rough ground, and narrower options suiting faster, smoother trails. You should also think about whether you want to run a tubeless setup, as many mountain bike tyres are tubeless-ready, offering lower rolling resistance and better puncture resistance without an inner tube. Casing thickness affects durability and weight too, so riders tackling sharp rocks or roots may want a reinforced option for added protection.