The CEMA SRC-BT-PF3024B is a ceramic hybrid bottom bracket that converts a PF30 frame shell to accept 24 mm crankset spindles — the standard used by Shimano and FSA. The Interlock adaptor design addresses the chronic creaking problem associated with standard press-fit BBs by providing a more secure, fretting-resistant interface.

  • PF30 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 format is engineered to sit firmly in the PF30 shell without the micro-movement that causes creak in conventional press-fit BB cups.

Fits frames with PF30 bottom bracket shells (OD 46 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
  • PF30 shell to 24 mm spindle conversion via Interlock adaptor system — no creaking press-fit issues
  • Suits 68 mm and 73 mm bottom bracket shell widths
  • 46 mm outer diameter fits PF30 shell standard
  • Compatible with Shimano and FSA 24 mm crankset spindles
  • CEMA precision manufacturing for smooth, consistent bearing performance
SpecificationValue
BB shell standardPF30
Spindle diameter24 mm
Adaptor typeInterlock
Shell width68 / 73 mm
Outer diameter46 mm
Spindle compatibility24/24 mm — Shimano, FSA
Bearing typeCeramic hybrid
ModelSRC-BT-PF3024B
SKU BPW-843
Barcode #
Brand CEMA
Shipping Weight 0.3000kg
Unit Of Measure each