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Thread: What is BB30

  1. #1
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    What is BB30

    I'm still confused as to what BB30 is. Can someone please give me a brief explanation as to what it is compared to another bottom bracket. I'm going to build up my own bike myself soon. Just want to go in informed.

    Thank you.
    I^2xR

  2. #2
    skobiken
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    Those who can give up essential liberty to obtain a little temporary safety, deserve neither. - Ben Franklin

  3. #3
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    BMX bikes have been doing this for awhile, at least the dirt/park/street ones. T'he BMX ones are not BB30 standard, they call it a mid Bottom Bracket. It is similar in the since that the bearings are the same as always, the cups just got removed and the BB shell was downsided to just fit a direct bearing pressed into the frame. As with internal headsets.....looks like the road and mountain bike manufacturers will follow the BMX trend......

  4. #4
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    Great so that means my 2011 Cannondale Quick CX 3 has BB30 but does not advertise it I wonder why

  5. #5
    Former Bike Wrench
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    I'm pretty sure it doesn't have a BB30...generally don't see it on a $750 bike.

  6. #6
    Fat-tired Roadie
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    Cannondale had the BB30 standard earlier, but advertised it as "System Integration." Basically the umbrella they put all of their weird standards under, when they come up with a way for them not to be compatible with other companies' stuff.

    They have a weird steer tube size on some bikes too. The hub for a lefty fork is another example. None of their ideas are necessarily bad, but sometimes they're pointless.

    I actually think BB30 is a good idea. It's a lot like an external bottom bracket, which I like, but without the added complication of the bottom bracket cups. And it's bigger, so a bigger person, with a bigger engine than me, may get an improvement in efficiency. I doubt I'd feel a difference.

    I'm hoping Shimano starts to support it soon.
    "Don't buy upgrades; ride up grades." -Eddy Merckx

  7. #7
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    Quote Originally Posted by mtnbiker72 View Post
    I'm pretty sure it doesn't have a BB30...generally don't see it on a $750 bike.
    Its a $750 bike yes, I know for that price it does not come with a BB30 Crank or even a press fit Bottom Bracket, but I think its System Integration that Its capable of accepting a BB30, Crank and Bottom bracket should I buy the parts.

  8. #8
    Fat-tired Roadie
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    I think you're confusing BB30 with the traditional cartridge style bottom brackets.

    According to Cannondale, you have a Tange Seiki Cartridge BB and a Shimano M-171 crankset. If Tange's bottom brackets are like their headsets, it's actually pretty good and should give you many years of trouble-free service. However, almost all cartridge bottom brackets for bikes made for the American market are for an English-threaded bottom bracket.

    If you're still not sure, post a pic of the left side of your bottom bracket. The systems look very, very different.
    "Don't buy upgrades; ride up grades." -Eddy Merckx

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