BB86 (86.5mm) - DirectFit Shimano


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Configuration Type



    The BBInfinite BB86 DirectFit Shimano bottom bracket works with all Shimano HollowTech road cranksets on the market, from Tiagra to Dura Ace. Our Shimano HollowTech Bottom Bracket ships with the special press tools and retaining compounds you'll need. All you need is the press for this Shimano BB86 PF86 BB.

    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. What would cause this? Easy; any obstruction that cannot be removed that 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 endurance. Each bearing comes lubricated with Kluber Isoflex Topas NB52. Lifetime Warranty.

    WS2 Coated Ceramitech Bearings: We took our amazing Ceramitech bearings and added an extremely durable, tungsten disulfide (WS2) coating that has a 0.03 coefficient of friction---which means it’s slicker than Teflon, graphite, and even molybdenum disulfide. WS2 has an affinity for oils and greases, which means it maintains a hydrodynamic layer of lubricant where it’s needed most. The result is astonishing spin performance and increased endurance. 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 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 86.5 mm bottom bracket features a Shimano optimized design that's 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.


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


    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.


    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.


    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 BB86 road bike bottom bracket. If you need a press, check out our Master Tool Press.


  • Installation Instructions

    1 Piece BB Instructions
    2 Piece BB Instructions
  • Technical Specifications

    1-Piece Weight:

    WS2: 67g | CERAMITECH: 68g | ABEC-7 SS: 70g

    Frame Width: 86.5mm

    Frame Diameter: 41mm

    Spindle Diameter: 24mm

    2-Piece Weight:

    WS2: 53g | CERAMITECH: 54g | ABEC-7 SS: 56g

    Frame Width: 86.5mm

    Frame Diameter: 41mm

    Spindle Diameter: 24mm

    Bearing Size: 6805

    Ceramitech 6805 | ABEC-7 6805

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