THETA TITAN // T47 Bottom Bracket, CNC Titanium Alloy

THETA TITAN T47 Titanium Bottom Bracket is CNC-machined from premium titanium alloy to deliver superior strength, corrosion resistance, and long-term durability compared to aluminum alternatives. This material advantage is especially critical for 86.5mm inboard variants, where the narrow tooling interface commonly leads to marring, rounding, and installation issues on softer aluminum cups. Titanium maintains crisp tool engagement for more reliable, damage-free installation and removal while contributing to extended service life.

Engineered for smooth, efficient performance, it combines precision bearings and advanced sealing to eliminate creaking, minimize drag, and provide excellent weather protection. The result is a lightweight yet exceptionally robust bottom bracket that offers dependable operation and easy home serviceability, making it the ideal choice for high-performance T47 frames where both installation confidence and ride quality matter. 

Technical Highlights

• Material: CNC-machined TC4 Titanium Alloy
• Construction: Precision-engineered monocoque-style cups
• Bearings: High-quality low-friction bearings with optimized preload
• Sealing: Multi-stage advanced sealing system for superior weather protection
• Spindle Compatibility: 24mm and 29mm (DUB)
• Shell Compatibility: Standard threaded T47 and wide inboard shells (86.5–92mm)
• Installation: Standard spline tool interface with enhanced durability from titanium construction
• Design Features: Creak-resistant interface and fully user-serviceable
• Finish: Polished titanium with subtle branding
• Weight: Approximately 90–110g depending on configuration
• Airborne Fitment:
  68.0mm:  Zeppelin Mk. IV, Zeppelin Mk. V, Arsenal 7°
  86.5mm:  Valor, Endeavor, Marauder