LANDROVER DEFENDER 130 ROCK SLIDERS WITH TREE BARS. FITS ALL DEFENDER 130 MODELS. Rock sliders or side protection bars are a must have for both recreational and serious off roaders. Protecting the sills and sides of your pride and joy is paramount. Keeping the bodywork away from large rocks, earth banks and trees will save a considerable amount of money in the long term. In most cases Terrafirma rock sliders are made from sturdy steel box section with or without the optional steel tube outrigger ‘tree bars’ that keep the bodywork away from immovable objects just waiting to damage your doors. Tree bars can also serve as a useful step for both entering the vehicle and accessing the roof rack.