Description

Shimano SM-BB72-41B PressFit Bottom Bracket – Road 86.5mm

Buttery-smooth rotation, maximum stiffness, and race-ready weight savings for your road bike. The Shimano SM-BB72-41B (Ultegra series) bottom bracket with Hollowtech II technology is the gold standard choice for road frames utilizing a PressFit bottom bracket shell with an 86.5 mm width and a 41 mm bore diameter.

Equipped with ultra-precise sealed cartridge bearings and weight-saving reinforced resin cups, this bottom bracket ensures optimum power transfer and a creak-free assembly. Its pro-level weather seals shield the inner steel bearings from water and road grime, maintaining effortless rotation kilometer after kilometer.

• Technology: Shimano Hollowtech II (for integrated 24 mm Road spindle axles)

• Frame Standard: PressFit BB86 (86.5 mm shell width – 41 mm bore diameter)

• Intended Use: Road Bikes, Gravel, Cyclocross

• Component Tier: Shimano Ultegra / GRX 800 quality level

• Regular Price: € 32.99 | Special Price: € 24.90

In-Depth Description

Peak efficiency of Hollowtech II technology engineered for latest-generation carbon road frames.

On modern road bicycles, bottom bracket stiffness is absolutely critical: every single watt delivered to the pedals must translate into forward momentum without structural frame flex. The Shimano SM-BB72-41B answers this demand perfectly, providing a seamless PressFit interface, ultra-smooth rolling resistance, and a level of total reliability that makes it the most widely chosen bottom bracket among top road bike manufacturers.

Advanced Resin Cups for a Creak-Free Fit

Unlike traditional metal cups, Shimano’s high-density engineering resin PressFit cups offer a massive structural advantage: they adapt smoothly to the microscopic internal tolerances of carbon fiber frames. This material dampens micro-vibrations, reduces the risk of contact wear between materials, and eliminates the annoying creaks frequently associated with poorly integrated PressFit setups. Furthermore, utilizing high-grade resin dramatically lowers the component's weight compared to standard threaded options.

Ultegra-Tier Bearings: Minimum Friction, Maximum Protection

This bottom bracket shares its build technology with Shimano's high-performance 11 and 12-speed Ultegra and GRX groupsets. The internal bearings feature super-finished races that slash rolling resistance to an absolute minimum, ensuring a light and incredibly responsive pedaling feel. Advanced labyrinth sealing locks out water during bike washes or rainy rides, fully protecting the internal steel balls from premature oxidation.

Seamless 24 mm Axle Integration

By maintaining Shimano’s battle-tested 24 mm road spindle diameter, the SM-BB72-41B is completely compatible with the entire lineup of Shimano Road (Dura-Ace, Ultegra, 105, Tiagra) and Gravel (GRX) cranksets, guaranteeing unrivaled structural stability and an axis that stays perfectly aligned.

Technical Components Specifications

5. What's in the Box

• 1x Right-side Shimano SM-BB72-41B cup with integrated sealed bearing

• 1x Left-side Shimano SM-BB72-41B cup with integrated sealed bearing and central connector sleeve

FAQ – Frequently Asked Questions

Q: Is this bottom bracket compatible with a Mountain Bike?

A: No. This specific model is designed exclusively for road, gravel, or cyclocross bikes featuring an 86.5 mm shell width. For mountain bikes with PressFit frames (which feature 89.5 mm or 92 mm shell widths), you will need the Shimano BB-MT500-PA or BB-MT800-PA standard instead.

Q: Which cranksets can I install with this bottom bracket?

A: It is fully compatible with all Shimano road and gravel cranksets equipped with an integrated 24 mm thru-axle (Dura-Ace, Ultegra, 105, Tiagra, Sora, GRX). It is not compatible with SRAM DUB (29mm spindle), SRAM GXP (24/22mm spindle), or any 30mm spindle setups.

Q: Do I need to use spacers or shims for a standard 86.5 mm road frame assembly?

A: No. On a standard 86.5 mm PressFit road shell, the cups are pressed directly flush against the frame without the use of any external spacers or shims.

CicloBottega Workshop Tech Tip

Expert Advice:

If you start hearing rhythmic "clicking" sounds coming from your pedal area during steep climbs or when throwing the bike around out of the saddle, your PressFit bearings might be worn out or may have developed micro-play. At our promotional price of € 24.90, the SM-BB72-41B is the perfect replacement to bring back the original whispering silence and efficiency to your machine.

Pro-tip for a flawless installation: PressFit bottom brackets demand specific tools—never use a hammer to install these cups! Always use a professional bottom bracket press tool (such as Park Tool or equivalent) to guarantee that both cups go into the frame completely straight and perfectly parallel. Before pressing them in, thoroughly clean the carbon frame bore shell. Apply a very thin film of teflon grease, anti-seize, or a mild retaining compound (strictly following your specific frame manufacturer's guidelines) to the outer surface of the resin cups to rule out any future moisture-induced creaking from the start.

 Shipping and Authenticity

• Fast Tracked Shipping: Dispatched quickly with reliable express delivery inside a secure, protective parcel.

• 100% Genuine Guarantee: Certified original Shimano product sourced directly from the official network, boxed in original retail packaging (never loose/OEM bulk stock).