BB30 (73MM) for DUB MTB Crank Sets


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    Our BBInfinite BB30 MTB DUB Pressfit module works with all DUB MTB crank sets on the market. All of our 29mm DUB bottom bracket modules ship with the special press tools and retaining compounds you'll need. All you need is the press itself. The BB30 Pressfit bottom bracket is also known as BB30 MTB, and measures 42mm x 73mm.

    Why would I choose a 2-Piece bottom bracket system?

    Our 2-Piece Bottom Bracket system is for any bike that cannot accommodate our 1-piece unit, making it the best DUB bottom bracket. What would cause this? Easy; any obstruction that cannot be removed which prevents our 1-piece module from passing from one side to the other in a straight line through the frame bottom bracket shell, which includes:

    1) The presence of a hydraulic line that cannot be moved out of the way.

    2) An immovable fixture, hump, frame feature, or cable guide.

    3) Any wires that cannot be moved out of the way entirely.

    Over 90% of the bikes out there can use a 1-Piece module. If you are unsure please email us with the year, make, and model of your frame, along with the crank set model and type, at, and we’ll get you sorted.


    Ceramitech Bearings: Our Si3n4 hybrid ceramic bearings feature ultra-spherical silicon nitride balls matched to SAE 52100 chrome steel bearing races that have been processed with additional heat treatment and polishing steps. The result is a hybrid-ceramic bearing that lasts longer than any steel bearing with spin performance no steel bearing can rival. We’re so confident in the durability of our Ceramitech bearings that we back them with a Lifetime Bearing Exchange warranty. These bearings feature mid-contact seals for extreme performance and durability. Each bearing comes lubricated with Kluber Isoflex Topas NB52. Lifetime warranty.

    ABEC-7 Steel Bearings: Crafted from SAE 52100 chrome steel, our BBInfinite ABEC-7 (ISO 492, Class 4) bearings are so buttery that you’d have to buy our Ceramitechs to find anything better. These bearings feature mid-contact seals for extreme performance and durability. Each bearing comes lubricated with Kluber or Koyo. 1-Year Bearing Exchange Warranty.


    BBInfinite bottom brackets for DUB crank sets maintain optimal chain-lines for crisp, consistent shifting and drivetrain performance while dishing out trouble-free mile after trouble-free mile. From the gorgeous, high-luster of our TypeII MilSpec hard anodized finish to the sculpted lines of our 2-Piece design that unitizes the bottom bracket structure to eliminate all potential creaks before they start, every aspect of our architecture fuses beauty with durability and performance.

    Our DUB spindle optimized design is set to the widest stance the crank set allows while ensuring that interfaces between crank arm splines and spindle splines have maximum engagement and Q-factor is set as narrow as possible.


    All BBInfinite bottom brackets for DUB spindle crank sets are 100% compatible with all crank-based power meters.


    The star of our BB's is the bearing itself. Our Ceramitech bearings feature Si3n4 (Silicon Nitride) balls running in heat treated chrome-steel races that go through a 3-step polishing process to ensure smooth running, durability, and mind-boggling spin performance. Our ABEC-7 all steel bearings feature hardened chrome-steel balls and races for high performance on a budget.

    Over-compression of the outer bearing race post-installation is the leading cause of diminished spin performance of pressfit BB’s.To prevent this, all BBInfinite 2-Piece bottom brackets feature our patented Reverse Half Grip bearing retention system, which channels external compression forces away from the center-line of the bearing, thereby letting the balls rotate freely. In fact, a mild over-compression condition will boost performance of our Reverse Half Grip design.


    Precise machining and modern chemistry combine to ensure every ride will remain creak-free mile after mile, year after year. Our precision allows us to create a cup-set that will match your frame while compensating for frame irregularities while VibraTite530 locks the cups in securely, yet allowing for easy removal when that day comes.


  • Technical Specifications


    WS2: 89g | CERAMITECH: 91g | ABEC-7 SS: 94g

    Weight 2-Piece:

    WS2: 60g | CERAMITECH: 62g | ABEC-7 SS: 67g

    Frame Width: 73mm

    Frame Diameter: 42mm

    Spindle Diameter: DUB

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Bottom Bracket Selection Guide