The Anti-Wobble Block includes the block, 3/4" ball bearing and two M6 screws for securing this in the hitch tube. It only works with BackStage and SplitRail as the other racks do not have the machined holes for the bearing and bolts.
Anti-Wobble Block Assembly SplitRail & BackStage
$19.95
BackStage Handle Assembly
$24.95
SplitRail Add-On
MSRP:
$249.95
$199.95
SplitRail LS
$679.95