The CEMA SRC-BT-BB3024B is a ceramic hybrid bottom bracket that converts a BB30 frame shell to accept 24 mm crankset spindles — the standard used by Shimano and FSA. The Interlock adaptor design provides a secure, fretting-resistant interface that eliminates the creaking associated with standard press-fit BB cups.

  • BB30 shell to 24 mm spindle conversion
  • Ceramic hybrid bearings — lower friction, longer life than steel
  • 68 and 73 mm shell width compatibility
  • Suits Shimano and FSA 24 mm cranks
  • Interlock adaptor system minimises press-fit creak

CEMA ceramic hybrid bearings use ceramic balls in steel races, delivering measurably lower rolling resistance and greater durability than standard steel alternatives. The Interlock adaptor sits firmly in the BB30 shell without the micro-movement that causes creak in conventional press-fit BB cups.

Fits frames with BB30 bottom bracket shells (OD 42 mm) and 68 or 73 mm shell widths. Compatible with Shimano HollowTech II and FSA cranksets using a 24 mm spindle.

Warranty claims for this product should be directed to Tune Cycles. Return the item to us with proof of purchase and we will manage the warranty process with the brand on your behalf.
  • Ceramic hybrid bearings reduce friction and extend service life compared to standard steel bearings
  • BB30 shell to 24 mm spindle conversion via Interlock adaptor system
  • Suits 68 mm and 73 mm bottom bracket shell widths
  • 42 mm outer diameter fits BB30 shell standard
  • Compatible with Shimano and FSA 24 mm crankset spindles
  • CEMA precision manufacturing for smooth, consistent bearing performance
SpecificationValue
BB shell standardBB30
Spindle diameter24 mm
Adaptor typeInterlock
Shell width68 / 73 mm
Outer diameter42 mm
Spindle compatibility24/24 mm — Shimano, FSA
Bearing typeCeramic hybrid
ModelSRC-BT-BB3024B
SKU BPW-844
Barcode #
Brand CEMA
Shipping Weight 0.3000kg
Unit Of Measure each