Thule Wing Bars, Wing Bar Edge and Slide Bars all feature a full width integrated T-Track slot to enable rapid and neat mounting of most Thule products and accessories. The advantages of a T-Track system are numerous. For instance it is possible to space out multiple accessories such as roof mounted bike racks by utilising the full width of the roof bars and therefore not be constrained by the position of the foot pack. Most current Thule products are supplied with T-Track adapters or available as optional extras. Thule T-Track adapters can often be retrofitted to older Thule roof boxes and many other previous products