Proprietary spokes, internal nipples, frame-specific seatposts….everyone in this industry wants to build that better mousetrap. Yet most of these “innovations” fail to deliver on their marketing promise, and no mechanic is excited to know that he’ll need to source more sku#s (or needs more tools to service them). So I had my doubts for the new T47 bottom bracket “standard”, but at least for the bikes we make at DKCB it has so far proven to be an advantage.
Above is a recent Davidson titanium with a T47 bottom bracket shell, 1-3/8” seat tube, and 1” chain stays. Below is an older Davidson titanium frame with BSA bottom bracket shell, 1-3/8” seat tube, and 7/8” chain stays.