ST Cartridge Bottom Bracket

Description |

The RPM JIS Bottom Bracket delivers reliable performance for riders using JIS square taper cranks.
Built with a forged chromoly spindle and industrial-grade sealed cartridge bearings, it offers a smooth and durable pedaling feel.
Cold-forged aluminum cups and double seals protect against water and dirt, keeping your setup running quietly and efficiently.

It’s a simple, dependable upgrade or replacement choice for any bike using a 68 mm English-threaded bottom bracket shell.

Features & Specs |

Model
Brand	RPM
Spindle Interface	Square Taper JIS
Spindle Length	103 mm
Spindle Material	Forged chromoly steel
Bearings	Industrial 6002KRS sealed cartridge
Cup Material	Cold-forged aluminum
Thread Type	English / BSA (1.37” x 24 TPI)
Shell Width	68 mm
Seals	Double-sealed for water and dirt protection
Includes	Crank bolts
Weight	295 g
Colour	Silver

 

Usage Tips & Compatibility |

Ideal For: Road, gravel, touring, and commuter bikes using JIS square taper cranksets.

Compatibility: 

• Fits frames with 68 mm English (BSA) threaded bottom bracket shells.
• Works with JIS square taper cranksets (such as FSA, Sugino, and many vintage models).
• Includes crank bolts for easy installation.
• Designed for setups requiring a 103 mm spindle for proper chainline.

Installation Tip: Grease threads and torque evenly to manufacturer spec for a quiet, secure fit.

Maintenance: The sealed cartridge and double-seal system minimize upkeep—just check during regular crank service for long-lasting smoothness.