I am aware my reply is not precisely addressing your request but I cannot resist to ask why?

PF30 may not be the perfect BB spec but the fact that some people have issues doesn't mean it generally does not work. With a metal frame properly machined according to the specs I would try a PF30 setup rather than bothering with a risky, irreversibe and costly conversion which might not be necessary.

Regarding any noise issue with BB30/PF30: Maybe it is more important to look at the spindle / bearing (inner race) interface - rather than the frame / BB cup interface that T47BB is addressing. Bottom brackets with plastic sleeves between spindle and inner race might be the solution to many BB30/PF30 creaking issues ...

 

I don't think I would do the conversion. And I'm not sure it's possible. Here's why. The T47 is basicly a Threaded BB that takes a 30mm spindle. The concept is that PF sucks. With T47 you get the advantage of a threaded shell with the stiffer modern 30mm spindle.
Well that means you need to cut threads in a Titanium shell. That's the first difficult part. And I'm not sure there's enough metal to make threads since the shell is smooth already?? Or Am I missing anything hear??

 

Let me know if you find a tap. I'm looking for one. If I were you and could find a tap I'd talk the builder into doing it.

 

I would ask this question again in six months. I think White Industries just showed an image of their first T47 taps. I wouldn't imagine there are more than a handful of taps out there.

Ask the builder of your frame or a local TI builder if you can find one in your area.

 

Since you haven't bought your frame yet, why not just go threaded bb? In the Ti world its still widely supported from builders.

 

The advantage of T47 (BB30 or BB386 width) over BSA is if you want the narrower, lighter BB30 cranks or if you're a frame builder and want to take advantage of an 86mm wide BB shell for a massive downtube. In the case of your frame you can ignore the second one so if you want to run Shimano cranks get BSA. If you want Sram or something else available with a BB30 axle why not go with the bigger diameter, shorter, lighter axle and get the narrow version of T47?

 

not sure what problem is being solved here, but sure....

 

The frameset I was looking at was the Litespeed G5 Gravel, which was on sale for about $1600 with the fork... I passed because of the PF30 BB, mostly because all my bikes are BSA and I really don't want to buy any more tools than necessary. If someone has suggestions for thru-axle Ti disc road frames that are BSA and support 29er wheels and in the same price range please share them!

 

There's been enough reports of creaky PF30s that I'd get not buying a bike because of that but not buying it because of a tool? First off you don't need a tool to install a PF30. A hammer and a block of wood will do. If you want to run Shimano cranks get that Praxis thread-together BB everyone loves and if it doesn't come with a wrench buy one (probably under $25) or pay a shop to put it in.

 

Great misinterpretation of my post there Einstein. I am really really starting to hate this place.

 

Is it that hard to follow? The PF30 may squeak, at which point I need taps, and a T47 install tool... I'd also need tools for the bigger crank, like the Campy over-torque tool, which isn't cheap. Of course I could run a regular crank but then I'm back to just getting a BSA frame in the first place....

 

This article manages to damp down any expectation that retro threading of an existing PF30 frame will be a simple, or cheap, task. It additionally makes the point that manufacturers such as Praxis already have excellent solutions for Shimano/SRAM/Campy in a PF30 shell. T47 looks like a good solution for OEM Ti or Alloy frames using BB30 or BB386 evo cranksets. None of the carbon frame manufacturers seem interested in reintroducing alloy sleeves.

Proponents of T47 are quick to point out that owners of problematic metal frames equipped with PF30 shells can be immediately retrofitted. By design, T47 threads can be cut directly into a PF30 shell with no additional changes – although actually doing so is easier said than done. And as any veteran shop mechanic will attest, there’s also no guarantee of success even if you do everything right.

One of t47's biggest obstacles may be that good solutions for creaky press-fit frames already exist. by threading the cups to each other, even persistently noisy frames can quiet down nicely: one of t47's biggest obstacles may be that good solutions for creaky press-fit frames already exist. by threading the cups to each other, even persistently noisy frames can quiet down nicely

“I do not see taking a current PF30 bike and then machining new threads being a smashing success,” says bike mechanic guru Calvin Jones of Park Tool. “It will take some very expensive tapping systems, not simply new taps used on old handles. Threads in an English bottom bracket shell sold as a tube are cut by a lathe. So for nice threads, you should be using two taps with this conversion: one to make a rough cut and a second follow-up for the final cut to full pitch diameter. One tap that is staged in two diameters might do the job, but piloting these into a smooth shell straight will be tricky.

“The circumference of the English cups is about 110mm, but these will be about 145mm, meaning a lot more surface contact and hence the force required is higher,” Jones continues. “Tapping is not a simple process. There will be some cases where everything is done by the book and the threads are trash. Your initial PF30 shells (like all shells) vary in hardness, bore sizing, amount of warp, plus issues in materials.”

T47 vs press-fit bottom brackets - BikeRadar

 

This article manages to damp down any expectation that retro threading of an existing PF30 frame will be a simple, or cheap, task. It additionally makes the point that manufacturers such as Praxis already have excellent solutions for Shimano/SRAM/Campy in a PF30 shell. T47 looks like a good solution for OEM Ti or Alloy frames using BB30 or BB386 evo cranksets. None of the carbon frame manufacturers seem interested in reintroducing alloy sleeves.



T47 vs press-fit bottom brackets - BikeRadar

+1 as usual.
While T47 looks like a good future option there are plenty of other options out there that will work just fine.

 

I went with a Praxis system for my cross frame that came with PF30. It was easy to install (once I had the tools) and has been a set-and-forget solution. No creaking.

 

I'm using the Torqtite BB from Enduro on my PF30 frame with a 386EVO crank and it works perfectly. Another friend is using the same setup with a BB30 crank on a steel PF30 frame, same thing, it works. On my road bike, I'm not even doing that much, I just installed the BB30 bearings the way I always do, and like all my other installs, it's quiet.
In my experience, it's rare to have a creaking BB when it's installed properly. The few that I've come across that continue to creak (actually only one in 4 years now, out of maybe a hundred or so) was resolved with a two part threaded BB like Praxis or Enduro.
I guess what I'm saying is I would never NOT buy a frame I wanted for something as simple as a BB format.