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Two silver stainless steel bearing cages, each with nine balls, 29.1mm outer diameter

Unique-Bargains

Unique-Bargains 2pcs 29.1mm 9 Ball Bearing Cage Crank Wheel Retainer

SKU CH-QGQ0-V28NB

Stainless-steel bearing cages with nine 6.4 mm balls fit 18.2 mm inner and 29.1 mm outer diameters for crank or wheel replacement

  • TypeBearings
  • Stainless steel construction resists corrosion for lasting performance
  • Nine precision balls ensure smooth crank rotation
  • 1 mm outer diameter fits common bicycle bottom brackets
  • 2 mm inner diameter matches standard spindle sizes
  • Two retainers included for complete crankset overhaul

Crank Bearing Replacement Kit

Two stainless steel ball bearing cages with 9 balls each arrive ready for installation. The retainers measure 29.1mm outer diameter and 18.2mm inner diameter to fit standard bicycle crank assemblies. Cyclists maintaining road, mountain or lowrider frames can swap worn units without special tools.

Stainless Steel Retainer Design

Each cage holds nine 6.4mm balls secured in a corrosion resistant stainless steel retainer that resists grit and moisture. The 7.8mm overall height matches common bottom bracket cups so the crank spins freely after fitting. Silver tone finish makes wear inspection simple during routine cleaning.

Verify Dimensions Before Ordering

Measure your existing bearing cage outer diameter, inner diameter and ball count to confirm a 29.1mm by 18.2mm by 9 ball match. Manual measurement tolerance of 1 to 2mm means slight variance is normal. Orders cannot be corrected once installed so check carefully.

Highlights

  • Stainless steel construction resists corrosion for lasting performance
  • Nine precision balls ensure smooth crank rotation
  • 1 mm outer diameter fits common bicycle bottom brackets
  • 2 mm inner diameter matches standard spindle sizes
  • Two retainers included for complete crankset overhaul

Specifications

BrandUnique Bargains
TypeBearings

Questions about this item

What inner diameter does the 18.2 mm bearing cage require on the crank spindle?

The cage fits a spindle with an 18.2 mm inner diameter and uses nine 6.4 mm stainless steel balls held in a 29.1 mm outer diameter retainer.

How much axial space does the 7.8 mm high retainer need inside the bottom bracket shell?

The retainer is 7.8 mm tall, so the bottom bracket cups must provide at least that much clearance between the spindle shoulder and the cup face.

Which way do the balls face when pressing the cage into the crank arm?

The balls must face outward toward the cup race; pressing the cage in backwards seats the retainer flange against the balls and prevents smooth rotation.

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