2.5 x 8 x 2.5 Shielded Ball Bearings Lot of 10 Bearings 2.5 x 8 x 2.5 Shielded Ball Bearings, this is a popular size that could be used in many RC Cars and Trucks, Bearings are made of Chrome Steel, inner diameter is 2.5mm, outer diameter is 8mm, and width is 2.5mm.