A 30x42x7mm cartridge bearing for a worn bottom bracket bearing, built to the exact size the original ran so the fit and preload stay right.

Highlights

  • Silicon nitride (Si3N4) ceramic balls for low friction
  • SAE 52100 steel races (stainless KS440 on some sizes)
  • Low-friction polyamide cage
  • High-quality ceramic-compatible grease

Compatibility & fit

Sold by size — match 30x42x7mm (ID x OD x width) against the bearing you're replacing. This size is used across several positions (bottom bracket, hub, pedal or pivot) depending on the standard it's built into — confirm it matches the position you're replacing before fitting.

Black Bearing covers manufacturing defects on its bearings for the period stated by the distributor at the time of purchase; wear from normal use, incorrect fitment or contamination is not covered. For warranty support, return the product to Tune Cycles and we'll manage the claim with Black Bearing's Australian distributor.
  • Silicon nitride (Si3N4) ceramic balls for low friction
  • SAE 52100 steel races (stainless KS440 on some sizes)
  • Low-friction polyamide cage
  • High-quality ceramic-compatible grease
Bearing size (ID x OD x width)30x42x7mm
GradeCeramic Hybrid
SCV codeBBBG-UB-6806-CS
SKU SCV-BBBG-UB-6806-CS
Brand Black Bearing
Shipping Weight 0.0500kg
Shipping Width 0.160m
Shipping Height 0.060m
Shipping Length 0.220m