This 32011 bearing is a Metric Size.Tapered Roller Bearing with a tapered inner and outer ring raceways as well as tapered rollers.The bearing's dimensions are 55x90x23mm. It is very easy to install.
Tapered roller bearings are commonly used for moderate speed, heavy duty applications where durability is required. Common real world applications are in agriculture, construction and mining equipment, axle systems, gear box, engine motors and reducers, propeller shaft, railroad axle-box, differential, wind turbines, etc.