Which Pads: The brakes are shipped with Shimano J03A resin - organic

They should only be installed with Fox Seal Drivers

This is a slide-on grip

Also fits on the 106 tool tray

Thule VeloCompact 4th Bike Adapter Virtual Parent Which Pads: The brakes areIf you already have one of the Thule VeloCompact 926 or 927, 2 bike or 3 bike carriers, you can increase your capacity by one bike with this handy add on. The 4th bike adapter clamps securely to the outermost wheel support platform on your existing VeloCompact carrier and provides the same wheel support platform and ratcheting wheel straps as the VeloCompact carrier with the addition of a small, double headed clamping arm that supports your 4th bike