Category 4 represents the use of bicycles and their components under the conditions of Categories 1, 2, and 3, as well as in very rough and partially obstructed terrain with steeper gradients and correspondingly higher speeds. Regular, moderate jumps by skilled riders pose no problem for these bikes. However, regular and prolonged use of the bikes on North Shore trails and in bike parks should be avoided. Due to the increased stresses, these bikes should be checked for possible damage after each ride. Full-suspension bikes with medium travel are typical for this category.

Category 5 represents the use of bicycles and their components under the conditions of Categories 1, 2, 3, and 4, as well as in challenging, heavily obstructed, and extremely steep terrain that can only be managed by technically skilled and very well-trained riders. Larger jumps at very high speeds and intensive use of designated bike parks or downhill tracks are typical for this category. It is essential to ensure that an intensive check for possible damage is conducted after each ride. Pre-existing damage can lead to failure under significantly lower subsequent loads. Regular replacement of safety-relevant components should also be considered. The wearing of specialized protective gear is strongly recommended. Full-suspension bikes with long travel, as well as dirt bikes, characterize this category.