Rubber protects vinyl or laminate flooring from scratches. The wheel tire is softer, non-marring silicone appropriate for rolling on a hardwood floor. Shelf top roller on track design maintains maximum vertical and horizontal shelf stability.

Added style to butcher block. They look much cooler than expected and glide smoothly. The locks work well on the wheels and it rolls like a breeze.

Great sturdy casters. Easy to install and lock. Impressed with all hardware for multiple mounting methods. Can be used on any sub.

These are definitely not rated for anywhere near 2200lbs.