Trimmed these to fit my T-slot crossbars and the rubber sits raised just enough that my kayak hull no longer scuffs on the metal. Loading and unloading finally stopped chewing up my gear.
Isabella R.★★★★★
The extra thickness on these really does the job—my kayak J-bars sit on them without a single scuff after a full season. Trimming them to fit the crossbars was easy with a utility knife, and the rubber grips the T-slot firmly without sliding.
Madison N.★★★★★
Slapped these on my crossbars before hauling my kayak and the raised rubber really does keep the T-slot edges from chewing up the hull. Trimming them to length was easy with a utility knife, and the extra thickness feels like it'll outlast the bars themselves.