If you want clearance through hard-to-pass areas, we invented these for you!
Frame clearance tubes start and end as a round shape. The center of the tube is ovalized from the top side. The entire bottom side of the tube will lie on a flat surface. In order to maintain cross-sectional area, the tubes taper up to a larger-diameter middle section, which is then ovalized asymmetrically.
They are made to accept 2.5", 3", and 3.5" diameter tubes.