A long type spring that realizes a flexible suspension that is essential for drifting. With a total length of 32 mm, which was set based on the data obtained from actual driving on various circuits, in addition to 5 types of regular pitch springs that are common to the series, there are 4 unequal pitch types that allow finer settings. Seed lineup The unequal length springs have mixed parts with different pitches in a single spring, and while supplementing small vibration absorption and mild initial reaction with fine winding parts, they firmly receive weight in rough parts during large rolls and improve traction. It is a product that has the conflicting characteristics of contributing. By combining it with an equal pitch spring, the setting width is greatly expanded, and it is possible to obtain the operation that suits each drift style.