All Series Bearings for Headset and Bottom Bracket Set of 10 (Outer diameter 31mm)

• 【Durable Material】Made of materials, these headset bottom bracket bearings are designed to be durable and long-lasting.
• 【Precision Design】Featuring a stainless steel ball inlaid in retainer design, these bearings ensure smooth and precise movement for your .
• 【 Compatibility】Designed as replacements for various types of bicycles, including road bikes, racing bikes, and mountain bikes, these bearings offer wide compatibility.
• 【Different Sizes】Choose from different sizes to fit your specific needs. Available options include 20mm, 25mm, 29mm, 31mm, and 37mm, allowing you to find the perfect fit for your bike.
• 【Easy Installation】With their user-friendly design, these bearings are and replace. follow the included instructions for a hassle-free installation process.

Description: * *Made of high-quality materials, durable， *stainless steel ball inlaid in the retainer design. *replacement for the or racing or mountain bike. *21/20mm, outer diameter 21mm, steel ball diameter 4.763mm, often used in front hub *25mm, outer diameter 25mm, steel ball diameter 6.35mm, often used in rear hub *29-22mm, inner diameter 22mm, outer diameter 29mm, steel ball diameter 6.35mm, common bottom bracket on the market *31-22mm, inner diameter 22mm, outer diameter 31mm, steel ball 4.763mm, used for Bottom Bracket *37-29mm, inner diameter 29mm, outer diameter 37mm, steel ball diameter 4mm, commonly used in ordinary front fork headset Specification: Material: steel Color: silver quality: 10PCS size: 20mm， 25mm, 29mm, 31mm，37mm(options) Package Includes: 10PCS bearing