no argument there, point is not a fan of the T47 BB

my main issue is lack of availability of bottom bracket cups for the Campagnolo UT cranks. There are several aftermarket ones available but at 4 -5x the cost of normal cups. Argonaut makes a nice looking set for about $75. A year ago there wasn't much available but that is slowly changing. Maybe by the time I decide to upgrade to the new SC it will be a moot point. My current SC with Campy Super Record EPS is fine but I really would like the disc brake option. Right now the bigger issue for me is the Campy TT EPS shifters aren't available with hydraulics.

But that's also not what that cost, gotta lump in the cost of the bikes, travel, hotels, etc. But that's pretty good, I'd throw a fiver at this if they did it again.

Wonder which aftermarket bar that is. It would be surprising to have that much tilt available in a stock bar, right?

Honestly, if your fit can be improved a little and your current kit has a bunch of wrinkles, 50W above 22mph sounds plausible for all those changes. Depending on details of course (tires, tubes, etc.)

Those of us of the duck footed persuasion find BB30 cranks* often have better heel/ankle clearance than most other current cranks...

What's the wattage loss with running a different set up though?

Slowman wrote:

i don't have a big problem with pressfit, in terms of the install, but there is no really good way to uninstall it. it's pretty violent. what T47 does is make the uninstall better. i'm curious to know your issue with this BB standard.

Park tool makes a "fairly expense" kit that allows non-impact removal of BBs, as do some companies that sell on Amazon (presumably Asian based companies). They don't work as well on stock shimano BBs but do work with aftermarket BBs.

https://www.parktool.com/...ess-puller-set-bbp-2

https://www.amazon.com/...3&language=en_US

From my understanding, T47 BBs are still threaded directly in the carbon frame (vs. metal insert), and I have heard that Press fit shell alignment issues are caused by carbon resin settling and contrasting during manufacturing as manufacturers don't want to wait days before boring the BB shell.

Since wheels mfg, BBInfinite are all charging a fortune for a one piece aluminum BB and people are paying for them. It seems like the natural thing to do is just go back to having a one piece alumnimum BB shell bonded in the frame which all but guarantees alignment, but alas we need new BB standards....

In short, pressfit's creaking issue might be a carbon frame issue, and pressfit came out when we stopped using an aluminum shell for BBs. Who knows if T47 will be enough of a fix. It's true that threaded interface are less prone to creaking when misaligned but it feels like a bandaid fix.

All this is, who knows if T47 is good or bad, most bike companies seem less engineer focused than marketing focused, this feels a bit like the specialized fork recall. Compression ring cutting fork? Redesign compression ring to be similar to the old venge and venge vias compression ring? Too much work. Let's just add a shim and call it a day. To make people feel good, let's give them this compression plug with an extra long end cap. you say the extra long end cap doesn't actually prevent a crash just makes the crash less worse? Good enough.

thanks. i spose i should've been aware of that tool. my process is more... ballistic. i used to press in my BB30 dry; i've taken now to using anti-seize in an effort to prevent creak. but i don't have enough data to render an opinion on that.

as to T47, i think a lot of folks are going to be working on their own bikes in the future. it's a big ask to either spend $650 on an extraction tool or take a big hammer to your bike in order to uninstall a BB. that's separate from the press to install it. i don't remember exactly why we felt (as an industry) that it was all of a sudden a good idea to press instead of thread a BB.

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Dan Empfield
aka Slowman

i don't remember exactly why we felt (as an industry) that it was all of a sudden a good idea to press instead of thread a BB.