VoiceVelo T47A Ceramic Bottom Bracket

T47-85.5 | 28.99 DUB & 24mm Shimano Compatible

Built specifically for the VoiceVelo ECHO — engineered for power transfer, durability and ultra-smooth rotation.

This T47A threaded bottom bracket is designed around the 77mm asymmetrical T47A standard (M47 x 1.0 pitch) used on the VoiceVelo ECHO frameset, delivering secure threaded fitment with the efficiency of modern ceramic bearings.

Available for both:

• SRAM DUB (28.99mm axle)

• Shimano 24mm axle standard

Why T47A?

T47A is an asymmetric threaded standard that combines:

• The stiffness and wide shell of press-fit systems

• The reliability and serviceability of threaded cups

With an 77mm shell width, T47A provides improved drivetrain alignment and extra drive-side clearance — ideal for modern road frames and power meter compatibility.

No creaks. No press-fit headaches.

Ceramic Bearing Performance

Inside each cup sits a precision ceramic bearing system featuring:

• Silicon nitride ceramic balls

• Double sealed

• Teflon assembly grease for smooth running

• Low-friction rotation under load

Ceramic bearings reduce rolling resistance while maintaining durability — especially important under high torque efforts and race conditions.

This is about efficient watt transfer, not marketing hype.

Construction Details

• Standard: T47A (T47-85.5)

• Shell Thread: M47 x 1.0 pitch

• Shell Width: 77mm

• Axle Compatibility:

  • 28.99mm SRAM DUB

  • 24mm Shimano

• Bearing Type: Ceramic (Silicon Nitride balls)

• Cups: CNC-machined aluminium

• Sealing: Double  seal system

Built for the VoiceVelo ECHO

Designed to match the ECHO’s T47A platform perfectly, ensuring:

• Correct chainline

• Smooth crank rotation

• Long service life

• Secure threaded installation

Off The Front Verdict

Threaded reliability. Ceramic smoothness. Modern compatibility.

If you’re building an ECHO properly, this is the bottom bracket it deserves.