The Thule Xsporter racks have an extruded bar with a set of rubber strips that fit into the extrusions. The strips will not STAY in there and the unit whistles loudly at most speeds when the strips fall out. I even tried glueing them in, but they still came out. My 2010 Tacoma will not let the bars down far enough to avoid the noise and would need them up, in any case, to actually haul anything.
How do people deal with these things??