Grade 25 loose ball bearings

Grade 25 is the highest quality ball bearing commercially available, as used in Shimano Dura Ace and Campagnolo Record hubs.

Available in four sizes.

Size info: Japanese loose ball front track hubs use 3/16", rear use 1/4". Campagnolo Record front hubs use 7/32", rear use 1/4". Tange-Seiki & Hatta headsets use 5/32". Sugino & Hatta bottom brackets use 1/4".

• sizes: 5/32", 3/16", 7/32", 1/4"

• sold in bags of 25