Grade 25 loose ball bearings
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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