MAINS SET STANDARD PRE A PLUS/EARLY A+ 1275

Main bearings, 1275 2" mains.STD size. Heavy duty steel backed bearing for durability and long life. The bearings to use if you want it to last. The only bearings to use on a fast road motor. Sintered copper lead, lead plated,steel backed Nominal Composition Copper 74% Lead 24% Tin 2%