PressFit Bottom Brackets problems in carbon frame Reign 2016- Mtbr.com
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  1. #1
    Giant Reign Advanced 1
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    New question here. PressFit Bottom Brackets problems in carbon frame Reign 2016

    Hi
    Some say there can be problem in BB in carbon frames, place is becoming loosen or something like that. So, those are dealing with it by replacing standart PF bottom brackets to some "connecting-type" like KCNC ( https://www.bike-components.de/en/KC...dapter-p26781/ )

    So, mine is Reign 2016 https://www.giant-bicycles.com/int/r...specifications and while it's new I think about replacing BB with some "correct" one so I will not have that problem in future.
    Which one? (options here https://www.bike-components.de/en/Cr...-Brackets-MTB/ )

    Thank you
    OK

  2. #2
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    I've had a Pivot 5.7c, 2 Yeti SB5 carbons - one for me, one for my wife - and a Giant Trance 29 Pro. I've never had a problem that was specific to a PF in a carbon frame.
    In fact, the one time I was convince the BB was making noise, it turned out that a weird brake line rub had developed and it was that which caused the noise.
    Last edited by MSU Alum; 02-01-2019 at 07:54 AM.

  3. #3
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    I have had numerous pressfit bottom bracket frames in both aluminum or carbon. I have had multiple different pressfit bottom bracket styles, including the oem shimano, the oem sram and even the most expensive wheels manufacturing thread together angular contact.

    I prefer the oem style shimano and sram gxp to all other options. The reason is that I have found that the thread together bottom brackets can loosen over time. A loose thread together bottom bracket poses a greater risk to the bottom bracket shell then any of the oem cheap style bottom brackets. That's because the aluminum sleeves that are pressed into the frame bottom bracket raceway can ovalize the carbon openings when they are loose.

    The thread together bottom brackets are great, but they require you to check them a few times a year. If you do not intend to do that, get the normal, cheap shimano, sram, raceface etc bottom bracket and set it and forget it.

    The complaints about pressfit bottom brackets and them creaking is an issue created by the internet... in the real world at local bike shops, this issue is few and far between. Especially recently as the frame mfg's have the machining dialed in.

  4. #4
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    If you decide to replace it, you may want to check out the wheels manufacturing site.
    https://wheelsmfg.com/bottom-brackets.html
    There's plenty of information there, and you can contact them with questions. I wouldn't replace what you have until you start getting notchy bearings, or you get actual noise from the BB.

    If I had to guess, and it's just a guess, this might work:
    https://wheelsmfg.com/bottom-bracket...nks-black.html

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