BB30 - is it just bearings and clips, and that's it?- Mtbr.com
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  1. #1
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    BB30 - is it just bearings and clips, and that's it?

    Hi everyone. I've a frame that requires a BB30 bottom-bracket. Is it true that all I need are some cartridge bearings and some clips? Like in the following?

    https://www.universalcycles.com/shop...s.php?id=32876

    No cups or anything?

    If it helps to know, I plan to install RaceFace Turbine Cinch cranks.

  2. #2
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    Can't really tell you until we know what frame you have.

  3. #3
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    Quote Originally Posted by mtnbiker4life View Post
    Can't really tell you until we know what frame you have.
    It's a Devinci Dexter frame. 73mm shell. Clearly is a BB30 shell, because grooves for clips.

    The Turbine Cinch crank has a 30mm spindle.

    Race Face doesn't appear to directly support BB30 though, so that leaves me guessing, and maybe I'll just go good old Shimano instead.

    The Cinch cranks would be fun though, if I can sort out which parts to buy.

  4. #4
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    I'd get a set of angular contact BB30 bearings.
    Death from Below.

  5. #5
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    I found this:

    SRAM BB30/BBRIGHT Direct Fit Bottom BRKT > Components > Drivetrain, Brakes and Pedals > Bottom Brackets | Jenson USA

    But the description requires a 68mm shell, and mine is 73. The bearings will still fit, I'm sure, as there is nothing inherent in the parts that would prevent them from fitting into the wider shell. Yet there must surely be some reason for SRAM to have specified 68mm.

    One of the reviews led me to this product:

    Jenson USA - Online mountain & road bike parts, clothing and accessories shop | Jenson USA

    This appears to be a Press Fit 30 (PF30) bottom-bracket, yet the product description clearly states that it's for BB30 shells.

    It's all pretty confusing, and I think at this point I may just punt and buy a Praxis Works adapter and some Shimano cranks.

  6. #6
    Formerly of Kent
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    You add 5mm of spacers to take up the extra axle space on a 68mm frame...
    Death from Below.

  7. #7
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    The Raceface chart says you use standard BB30 bearings plus a Raceface spacer kit. I assume as LeDuke says, you would need to add 5mm of additional spacers.
    http://www.raceface.com/comp/inst/BBchart-x2.pdf

  8. #8
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    Quote Originally Posted by JonathanGennick View Post
    I found this:

    SRAM BB30/BBRIGHT Direct Fit Bottom BRKT > Components > Drivetrain, Brakes and Pedals > Bottom Brackets | Jenson USA

    But the description requires a 68mm shell, and mine is 73. The bearings will still fit, I'm sure, as there is nothing inherent in the parts that would prevent them from fitting into the wider shell. Yet there must surely be some reason for SRAM to have specified 68mm.

    One of the reviews led me to this product:

    Jenson USA - Online mountain & road bike parts, clothing and accessories shop | Jenson USA

    This appears to be a Press Fit 30 (PF30) bottom-bracket, yet the product description clearly states that it's for BB30 shells.

    It's all pretty confusing, and I think at this point I may just punt and buy a Praxis Works adapter and some Shimano cranks.
    PF30 shell has the same tolerances as a BB30 shell minus the clip ring grooves.

  9. #9
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    Quote Originally Posted by mtnbiker4life View Post
    PF30 shell has the same tolerances as a BB30 shell minus the clip ring grooves.
    Ok. This is beginning to make sense. Then could I stuff in Race Face's PF30 BB and call it a day?

    This one: Race Face

    If the shell is the same, then the PF30 should fit, right? And that gets me to the Race Face crank that I want, and life is good.

    Am I thinking correctly here?

    Edit: I guess it won't work. Found this:

    BB30 vs PF30

    Shell diameter is different. So a PF30 is a no go.

    I'm just going to buy a Praxis Works adapter and call it a day. I've used their product before, am familiar with it. I'll run Shimano cranks. I'll miss the bling of the RF colors, but no big deal.

  10. #10
    Formerly of Kent
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    Is there some reason you won't just run a standard BB30?

    If properly installed, and of proper design (see above), you'll get years of use out of them.
    Death from Below.

  11. #11
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    Quote Originally Posted by Le Duke View Post
    Is there some reason you won't just run a standard BB30?
    I know it makes me sound pretty lame, but I couldn't work out which parts to buy. Wanted to get the order in yesterday. Don't want any surprises. Went with what I know works.

    Nothing against BB30 per se. I've just never actually seen one before, ever. I don't want to end up without some needed wavy washer or micro-shim or something, so I bought a BB I'm already familiar with from having once built up a PF30 frame.

    Maybe later this summer I'll find another BB30 frame that I'm not in a hurry to ride, and I'll order some parts, and I'll get my head around BB30 and what it entails. I think I will do that, actually, but just not on the current build.

  12. #12
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    Not much to wrap the head around. BB30 is BB30.

    It gets complicated when you try to stuff the CINCH cranks with their 30mm spindle into a frame designed around a 24mm spindle (one with a BB92 bottom bracket, for example). There are much fewer BB's on the market that will allow you to use a 30mm spindle in a bike with a BB shell that size.

  13. #13
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    Simple for me

    BB30 - is it just bearings and clips, and that's it?-image.jpg

    Not sure why so confusing:

    BB30 + cranks + adaptor set and normal required spacers
    Race Face
    '02 Rockhopper Comp
    '11 Specialized Epic Comp 26
    '11 Kona Kula Watt

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