First Co A-Head Bearing CB-230 31x43.5x7 - Silver

The First Co A-Head Bearing CB-230 31x43.5x7 - Silver is a high-quality bearing designed for use in cycling. Made from durable steel, this bearing is built to last and withstand the rigours of cycling. With a measurement of 31x43.5x7, it is the perfect size for use in a variety of different bikes.The outer and inner ring of the bearing are made from CrMO, which is a type of steel known for its strength and durability. The balls are also made from CrMO and have a hardness rating of HRC 61-66, making them incredibly tough and resistant to wear and tear. The cage is made from steel and provides additional support and stability to the bearing.The bearing is sealed with 2RS rubber, which provides a light contact seal to keep out dirt and debris. The grease used in the bearing is MULTEMP SRL (kyodo Yushi), which is a high-quality lubricant that helps to reduce friction and extend the life of the bearing. The tolerance of the bearing is ABEC-3, which means it has a high level of precision and accuracy.Overall, the First Co A-Head Bearing CB-230 31x43.5x7 - Silver is an excellent choice for anyone looking for a high-quality bearing for their bike. With its durable construction, precision engineering, and high-quality materials, it is sure to provide reliable performance for years to come.