4"x2" Heavy Duty Phenolic Caster Wheels with Roller Bearing - 800 lbs Capacity Each (Set of 4, 3200 lbs Total) - Includes Free 1/2" Bushing - Replacement Wheels for Utility Carts, Hand Trucks, Dollies & DIY Projects - Ideal for Warehouses, Workshops & Industrial Use

I bought these to replace the cast metal/urethane "skid" wheels my RV dealer installed on the back of my motorhome that shattered (throwing metal shards in a 10 ft radius) the 2nd time we drove the rig into our steeply sloped driveway.These phenolic wheels have been in and out of the drive at least 1/2 times since I installed them and show virtually no damage.I thought that they might be a less expensive yet still destructible alternative to the OEM wheel instead they have proven to be significantly more durable.As to cost this set of 4 wheels with bearings is less than 1/2 the price of a single replacement cast wheel from the OEM.Very Pleased with this purchase.