Enduro calls its ceramic balls the ultimate upgrade for rolling components. These are 1/4" Grade 5 balls in pure silicon nitride from Japan, made for low friction and no corrosion.

Highlights

  • 50 loose 1/4" (0.25") balls
  • Grade 5: within 5/1,000,000" of perfectly round
  • Pure silicon nitride (Si3N4) from Japan
  • High density from uniform compaction (3.25 g/cm³)
  • 60% lighter and seven times harder than steel, says Enduro

Why silicon nitride

Enduro uses only silicon nitride for its ceramic balls. It's tougher and less brittle than other ceramic materials, and Enduro says nothing compares for corrosion resistance or freedom from magnetic problems. Being lighter and harder than steel, it brings friction down to the lowest level possible.

Compatibility & fit

Loose 1/4" balls for rebuilding or upgrading bearings that use this ball size. Check the ball diameter and count your part calls for before ordering. Bearing servicing and rebuilds are a separate service in our workshop.

Enduro Bearings backs its bearings, components and tools with limited warranty coverage, and repairs or replaces products found to have a defect in materials or workmanship. Damage from improper installation, misuse or contamination isn't covered. For warranty support, return the product to Tune Cycles and we'll manage the claim with Lusty Industries, Enduro Bearings' Australian distributor.
  • Pack of 50 balls, 1/4" (0.25") diameter
  • Grade 5 sphericity
  • Pure Si3N4 silicon nitride from Japan
  • Corrosion resistant and free of magnetic problems
Enduro part numberBKC-0021
Ball diameter1/4" (0.25")
Quantity50 pieces
Grade5
MaterialSilicon nitride (Si3N4) ceramic
Density3.25 g/cm³
SKU LUS-EBSPBKC0021
Barcode # 810191016168
Brand Enduro Bearings
Shipping Weight 0.0800kg
Shipping Width 0.160m
Shipping Height 0.060m
Shipping Length 0.220m