Argonaut x Chris King

T47 Bottom Bracket: Precision, Performance, and a Quiet Ride

The bottom bracket sits at the center of the bike, transferring power from the rider into forward motion. Small inconsistencies in this area—alignment, fit, or tolerance—can affect the entire system. The T47 standard was developed to remove those variables and improve consistency where it matters most.

Why It Exists

Press-fit bottom brackets gained popularity for their larger shell diameters and potential stiffness gains. In practice, they often introduced problems: noise, imprecise alignment, and long-term wear. Those issues weren’t theoretical. They showed up on the road.

The T47 standard addresses those problems directly by combining a larger shell with a threaded interface.

What It Changes

A threaded system allows the bottom bracket to be installed with consistent alignment. That reduces the likelihood of creaking and improves long-term durability. At the same time, the larger shell diameter maintains the stiffness benefits associated with modern carbon frame design.

The result is a system that remains stable under load and quiet over time.

How It’s Built

Developed in collaboration with Chris King Precision Components, the T47 standard reflects a focus on tolerance and repeatability. The interface is designed to work with high-quality bearings and a range of cranksets, while maintaining the structural integrity of the frame.

It is not an added feature. It is part of how the bike performs as a whole.

T47 vs. Press Fit

Press-fit systems rely on tight tolerances within the frame itself. When those tolerances vary, performance follows. The T47 threads directly into the frame, removing that dependency and ensuring consistent installation.

The difference is not visible, but it is measurable in how the bike rides—and how it sounds.

For a closer look at how the T47 system works in practice, watch the full video and see how it contributes to overall ride quality >