WHEELSMFG BB86 THREADDED BOTTOM BRACKET A/C SHIMANO

The Wheels MFG BB86 Threaded Outboard Bottom Bracket represents the ultimate cure for the persistent creaking and alignment issues that often plague PressFit bicycle frames. Engineered and precision-machined in Colorado, USA, from high-grade 6061-T6 aluminum, this innovative bottom bracket features a clever two-piece threaded design. Rather than simply pressing raw bearing cups into your carbon or alloy frame shell, the drive and non-drive sides thread directly into one another inside the bottom bracket junction. This mechanical connection ensures the assembly remains perfectly parallel, completely eliminating the micro-movements, shifting, and water ingress that cause frustrating frame squeaks.

At the heart of this high-performance component are premium Enduro Angular Contact (A/C) bearings. Unlike standard radial cartridge bearings that only handle perpendicular loads, angular contact bearings are designed with a specialized internal race geometry that manages both radial and heavy lateral cornering forces simultaneously. This architectural design spreads internal ball bearing friction symmetrically, which dramatically reduces rolling resistance and prevents premature wear when you are out of the saddle laying down maximum power on tough climbs. Machined to accept industry-standard Shimano Hollowtech II 24mm spindle cranksets, this bottom bracket features full serviceability and double-lip labyrinth seals to survive the grittiest Australian gravel and road environments.

Key Features

• Thread-Together Architecture: The drive and non-drive cups thread directly into each other inside the frame shell, guaranteeing permanent alignment and a completely silent, creak-free ride.

• Enduro Angular Contact Bearings: Engineered to handle both vertical and lateral thrust loads simultaneously, reducing internal friction and maximizing component lifespan.

• CNC-Machined 6061-T6 Aluminum: Sculpted from high-grade aircraft aluminum to deliver precise tolerances, high durability, and resistance to shell ovalization.

• Labyrinth Dual-Lip Seals: Equipped with high-efficiency outer dust shields and internal seals to block out trail dust, rain, and corrosive sweat.

• Shimano 24mm Compatibility: Specifically matched to accept standard 24mm crank axles, including Shimano Hollowtech II, RaceFace EXI, and FSA 24mm options.

• Fully Serviceable Design: Built for long-term ownership, allowing the cartridge bearings to be easily purged, re-greased, or entirely replaced without throwing away the aluminum cups.

Specifications

• Brand: Wheels Manufacturing (Wheels MFG)

• Frame Shell Compatibility: BB86, BB89.5, BB92

• Inner Shell Diameter: 41mm PressFit

• Shell Width Range: 86mm to 92mm

• Crank Spindle Compatibility: Shimano 24mm Hollowtech II

• Bearing Type: Enduro Angular Contact (AC) Black Oxide

• Material: CNC-Machined 6061-T6 Aluminum

• Tool Requirement: Compatible with 44mm, 16-notch bottom bracket tools (such as Park Tool BBT-9 or BBT-69.2)

• Weight: Approx. 105g

✅ Why This IS For You

• Riders Chasing Drivetrain Silence: The absolute best upgrade if you are driven mad by a constant, annoying press-fit click or creak every time you pedal hard out of the saddle.

• High-Mileage Road & Gravel Cyclists: The Enduro Angular Contact bearings thrive on the lateral twisting forces of out-of-the-saddle climbing, outlasting standard radial bearings by a wide margin.

• Carbon Frame Owners: Protects the delicate carbon fiber tolerances of your frame's bottom bracket shell from wearing out or becoming ovalized over years of hard use.

• All-Weather Commuters: Perfect for riders facing gritty, wet, or dusty trails where standard, cheaply sealed press-fit units tend to ingest grime and seize up quickly.

❌ Why This May NOT Be For You

• Oversized Axle Loyalty: Designed strictly for standard 24mm crank spindles; it will not accommodate 30mm BB30 axles or 29mm SRAM DUB cranksets.

• Proprietary Tooling Required: Unlike basic press-fit cups that press in silently, this unit requires two 44mm, 16-notch outboard bottom bracket wrenches to properly torque the halves together.

• Ultralight Race Weight Seekers: Because it integrates a solid, threaded internal aluminum sleeve, it carries a small weight penalty of roughly 30g to 40g over minimalist, unthreaded plastic press-fit cups.

BFC Pro Tip

When installing this thread-together bottom bracket, never thread the cups into each other dry! Apply a generous, uniform coating of high-quality waterproof grease or a dedicated anti-seize compound to the internal aluminum threads of the cups, as well as the contact faces that press into the frame shell. When tightening the two halves together with your 16-notch wrenches, always hold the drive side stationary and do all your active torquing from the non-drive side. This prevents the internal sleeve from twisting inside your frame, ensuring a super-smooth, perfectly seated, rock-solid installation!