Author Topic: t47 internal Bottom bracket cups  (Read 1841 times)

Sakizashi

t47 internal Bottom bracket cups
« on: July 25, 2025, 02:37:27 PM »
Hey all, I'm looking to get some high-quality T47i cups. Don't really care about the quality of the bearings. I want 1-2 sets, not 50. I'm also happy to pull existing bearings and press new ones in with bearing retaining compound.

I'm curious to know if you all have any suggestions based on the quality of machining etc.

Edit: To clarify, I am trying to understand if anyone has bought a source for just the cups, or has bought a T47 BB and been really impressed with the machining/metal quality. I have a stock of 6806 2rs bearings that I like that I plan to use.
« Last Edit: July 25, 2025, 07:45:00 PM by Sakizashi »

bremerradkurier

Re: t47 iinternal Bottom bracket cups
« Reply #1 on: July 25, 2025, 02:59:12 PM »
The Praxis T47 internal BB was outstandingly well made compared to the creaky Kattus Ceramic BB it replaced and easily threaded in by hand compared to the fussy Kattus.

They do need Praxis' proprietary 12 notch tool that locks tight into the cup notches with zero play or wobble.

jonathanf2

Re: t47 iinternal Bottom bracket cups
« Reply #2 on: July 25, 2025, 04:28:13 PM »
Make sure to grease the back end of the internal T47 cups for an additional layer of moisture protection. On my first T47 BB, I rode my frame in heavy rain and a few days later the bearings were cooked from the inside. After that I greased the f**k out of the T47 bearings to repel any water. I'm a bit hesitant to recommend internal T47 frames in bad weather conditions. They're not easy to find in remote locations compared to threaded BSA and they tend to cost more.