Grade 25 loose ball bearings
$ 6.00
Grade 25 is the highest quality ball bearing commercially available, as used in Shimano Dura Ace and Campagnolo Record hubs.
Available in four sizes (see info below).
• sizes: 5/32", 3/16", 7/32", 1/4"
• sold in bags of 25
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".