The high-quality and reliable GoJak Caster Assembly is engineered to provide you with a quick and easy means of repairing the wheels of your GoJak. Available in 4” and 5” sizes and very easy and quick to install, the caster assembly is built from high-quality materials for better durability and performance. Once installed, your GoJak can continue to move smoothly along the ground so that you can get the job done with much more efficiency.