Hangzhou Gravity Caster Technology Co., Ltd was established since 1989, which is one of the leading customized polyurethane and rubber wheel manufacturers in China ， has become a century-old brand 68 years later. Through decades of painstaking management, Gravity has achieved breakthrough achievements in the industry. Our products are famous for their excellent performance and long service life, and have an excellent reputation among consumers. Supply to more than 60 countries around the world.
  We lead the industry by designing unique polyurethane blends to achieve superior physical properties, greatly extending product life and performance. Known for providing design and engineering support to our clients, we excel at solving a variety of problems for our clients. We not only produce high-quality polyurethane wheels, but also rubber wheels and related hardware frames and components.