McDonald Bros Racing have been producing there universal chassis rails to suit 4 link, ladder bar and Tri 4 link rear suspension systems for over 10 years. They are the perfect way to narrow the rear chassis to accept those extra large tyres. The profile allows adequate clearance for suspension and differential components, while allowing for a low ride height with tall tyres. The rails are constructed from 75 mm x 50 mm x 3 mm RHS material and mandrel formed to a uniform finish and dimension. For the customer that requires something special for there particular application we can also manufacture rails from a basic drawing.