Bike Ball Bearing Retainer Set 5/16 Inch Ball Bearings For Bicycle Crank Bottom Bracket Replacement 4 Pcs MTB Mountain Bike Parts Repair Accessory Compatible With Crank Bearing Retainers And Spacers

4-Pack 5/16" Bike Crank Ball Bearing Retainers
✔️ Outer 44.5mm, inner 32.5mm, ball 5/16 inch, 4 pcs included

Bicycle crank bearing retainers are stainless steel ball bearings set in a compact retainer, designed to replace worn crank bearings in MTB and other bicycles, typically at the crank bottom bracket.

✅ Outer diameter 44.5 mm (1.74 in), inner diameter 32.5 mm (1.28 in)
✅ Ball diameter 5/16 in, stainless steel, retainer design
✅ 4 pcs replacement set for MTB crank bottom bracket
✅ Compatible with mountain bikes, road bikes, and urban bikes

💡 What is a bike crank bearing retainer used for in DIY MTB maintenance?

This handy piece helps keep the crank bearings properly seated and aligned, reducing play and extending the life of the bottom bracket.

- Keeps bearings in place for smooth rotation
- Reduces wear on crank and bottom bracket
- Easy replacement using standard 5/16 inch ball size