BB30A (73mm) DirectFit Shimano

BB3A-SH-RD-BLK-ASMCT

Size Guide
Color
Black
Bearing
Frame Set


 

  • JUST THE FACTS:

    The BBInfinite BB30A (73mm) DirectFit Shimano module works with all Shimano HollowTech road cranksets on the market, from Tiagra to Dura Ace. Our BB30a bottom bracket ships with the special press tools and retaining compounds you'll need.  All you need is the press.

    DOES NOT FIT: CAAD12 disc, Slate, or Synapse Alloy Disc due to the hydraulic line passing through the frame's bb shell.

    This does not fit ANY SuperSix Evo models as they are PressFit30A, not BB30A.

    MORE THAN EXTREME SPEED AND SILENCE:

    BBInfinite DirectFit Shimano bottom brackets maintain optimal chain-lines for crisp, consistent shifting and drivetrain performance. Duel polymer bearing shields seal out dirt and debris while isolating the steel crank spindle from the steel bearing races to eliminate a major source of creaking.

     

    Our Shimano optimized design is set to the narrowest stance the crank set allows. This ensures that the interface between the non-drive crank arm and the spindle have the maximum amount of spline engagement and Q-factor is as narrow as possible.

    POWER METER FRIENDLY

    All BBInfinite DirectFit Shimano bottom bracket modules are 100% compatible with all crank-based power meters.

    WHY DO BBINFINITE BOTTOM BRACKETS SPIN LIKE CRAZY?:

    Bicycle frame bottom bracket shells are notoriously misaligned, inconsistent, and out of round, and so it’s inadvisable to use the bike frame as the primary aligning member for bottom bracket bearings. Yet, that’s what our multi-piece bottom bracket competition does, and this explains why their systems frequently fail prematurely and creak.

    A BBInfinite OPD (One-Piece-Design) bottom bracket module is a CNC precision-machined hub---like the front wheel hub on your bike---that you press into your frame. And just like your trouble-free wheel hub, BBInfinite OPD bottom brackets have perfectly aligned bearings regardless of your frame’s BB shell alignment and tolerances. Perfectly aligned bearings are essential for thousands of miles of trouble-free use and extreme spin performance.

    WHAT KEEPS BBINFINITE BOTTOM BRACKETS FROM CREAKING?

    BBInfinite OPD is the answer for creaking bottom bracket problems as well. Pedaling forces conspire to lever, and rock, and eventually work multi-piece systems loose. The unitized nature of BBInfinite OPD cancels these forces out entirely, which means creaking has no place to start in the first place. It really is that simple.

    INSTALLATION IS A SNAP WITH BBINFINITE:

    Every BBInfinite module ships with the special press tools, hardware, instructions, and the retaining compound you need to get the job done correctly with ease and confidence. All you need is the press for this road bike bottom bracket. If you need a press, check out our Master Tool Press.

     

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  • Technical Specifications

    Weight: Ceramitech: 79g | ABEC-7: 84g

    Frame Width: 73mm

    Frame Diameter: 42mm

    Spindle Diameter: 24mm




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