Chris King ThreadFit T47 30i Bottom Bracket

The Chris King ThreadFit T47 30i Bottom Bracket brings together the best of both worlds — the threading reliability of a traditional bottom bracket with the stiffness and compatibility of the T47 system. Designed for 30 mm cranks in T47 frames, this unit is built for longevity, serviceability, and optimal drivetrain performance. With Chris King’s legendary angular-contact bearings, this bottom bracket delivers ultra-smooth rotation, low friction, and excellent durability over time. It’s fully serviceable, allowing users to maintain peak performance with fresh grease or replacement parts. The ThreadFit design ensures secure, noise-free operation free from common issues seen in press-fit systems. Chris King ThreadFit T47 30i – Specs at a Glance Compatibility: Designed for 30 mm spindle cranksets Shell Type: T47 (threaded 47 × 1.0 mm) Shell Widths Supported: Wide range via internal sleeve system (for “i” versions) to cover various frame widths Bearings: Chris King angular-contact cartridge bearings Serviceability: Fully rebuildable/greaseable Included Parts: Proper sleeves / spacers to adapt to shell width and spindle length Warranty: Covered under Chris King’s lifetime warranty policy Design Benefits Threaded security: Eliminates creaks and instability common in press-fit designs. Stiff and efficient: Threads directly into the frame for stronger interface, paired with 30 mm crank compatibility. Premium bearings: Angular-contact bearings provide smooth operation and long life under load. Service friendly: Easy to disassemble, clean, and re-lubricate — ideal for long-term upkeep. Adaptable fit: Sleeve system allows compatibility with a variety of T47 shell widths while maintaining correct chainline. Final Take The Chris King ThreadFit T47 30i Bottom Bracket is a top-tier choice for riders building or upgrading frames with the T47 interface. With its threaded installation, precision bearings, and full serviceability, it offers quiet, efficient performance that can be maintained over years of use. In short: a premium, future-proof solution for high-end drivetrain builds.