Wheels MFG 1/4-inch Loose Ball Bearings
Grade 25 loose ball bearings to fit many brands of hubs, headsets, and bottom brackets.
Every mechanic should have some of these on hand. Since rear hubs take such a beating on a regular basis, it's important to overhaul them a little more frequently, especially for all the Clydesdales out there. Your cups and cones will thank you. If it's your first time overhauling a BB or a rear hub refer to the BBB for straightforward instructions: http://www.pricepoint.com/Brand/Park-Tool/Park-Tool-BBB-2-The-Big-Blue-Book-Of-Bike-Repair.axd
Great replacement wheels spin great now
yup they are spherical, working well!