61903-2RS (6903 2RS) Deep Grooved Ball Bearing / Thin Section
61903.2RS (6903 2RS) Sealed Thin Section Bike Bearing . Metric 17x30x7 . SKF Premium Quality. Deep Groove Ball Bearings are the most common bearing type found in a wide variety of applications. Versatile and robust they are available in a wide range of sizes and options including seals, shields and special clearance for high speed applications.