The Shimano BB-MT500-PA Deore Press-Fit Bottom Bracket is a reliable component designed to offer high driving efficiency for mountain biking. This bottom bracket is specifically engineered for Shimano Deore MTB cranks, providing compatibility with 24mm spindles commonly found on Shimano MTB cranksets. Press-Fit Design: This bottom bracket features a press-fit model, meaning it fits securely into a frame with a compatible bottom bracket shell width without the need for threading. The press-fit design simplifies installation while ensuring a stable and durable connection. Improved Sealing: With improved sealing compared to previous models, the BB-MT500-PA effectively keeps out contaminants such as dirt, water, and mud, enhancing the durability and reliability of your bike, especially in harsh riding conditions. Smooth Rotation: High-quality bearings ensure smooth rotation and efficient power transfer, contributing to a more enjoyable riding experience. The bottom bracket's construction allows for consistent performance, even on demanding trails. Durable Construction: Constructed with durable materials, the Shimano BB-MT500-PA is built to withstand the rigors of mountain biking, offering long-term reliability and performance. Ease of Maintenance: While press-fit bottom brackets typically require specific tools for installation, they provide a secure fit and are often favored for their simplicity. Additionally, the improved sealing reduces the need for frequent maintenance, allowing you to focus more on riding and less on upkeep.

Experience a new level of cycling efficiency with the Shimano Deore BB-MT501 Hollowtech II Threaded Bottom Bracket. Designed to provide high driving efficiency, this bottom bracket features better sealing and smooth rotation, making it the perfect choice for serious cyclists seeking optimal performance. Seamless Compatibility with Hollowtech II: The Shimano Deore BB-MT501 is specifically engineered for compatibility with Hollowtech II cranksets, ensuring a perfect fit and maximum power transfer to the drivetrain. Enjoy a seamless connection between the crankset and bottom bracket, resulting in enhanced efficiency during every pedal stroke. Precise Sealing for Enhanced Durability: Equipped with improved sealing technology, the BB-MT501 offers superior protection against dust, dirt, and moisture. This enhanced sealing ensures that your bottom bracket remains free from contaminants, promoting longevity and consistent performance in diverse weather conditions. Smooth and Effortless Rotation: Say goodbye to friction and resistance as the BB-MT501 delivers smooth and effortless rotation. The bottom bracket's precision engineering ensures a fluid motion, minimizing energy loss and optimizing your cycling experience. Designed for 68/73mm Shell Width: The Shimano Deore BB-MT501 is designed to fit bottom bracket shell widths of 68mm and 73mm. This versatility allows it to be compatible with a wide range of mountain bikes, providing a secure and reliable foundation for your drivetrain.

Please refer to the instructions below to confirm the specifications for each model.

Bottom Brackets BB86 (Press Fit-Metal), Compatible with Spindle 29/30mm

Please refer to the instructions below to confirm the specifications for each model.

Please refer to the instructions below to confirm the specifications for each model.

Please refer to the instructions below to confirm the specifications for each model.

Shimano BB-UN300-K Square Spindle 68mm Bottom Bracket Features Fits JIS square-taper cranksets Crankarm fixing bolts sold separately Hollow spindle For chain case Included 0.7mm spacer  Additional Info Country of Origin: Malaysia/Japan Imported By: Shimano South Asia Pvt Ltd. , 19 , (Ground Floor) Kumara Krupa Road , Bangalore – 560 001 , Karnataka , India. Net Quantity: 1N Customer Care Address: 291, 10 Main, 5 Block, Jayanagar, Bangalore - 560041. Ph: (080)47183232, Email: support@bumsonthesaddle.com Commodity: Bottom Brackets

The Shimano BB-UN300 is a square taper bottom bracket built to deliver long-lasting performance and dependable support for your drivetrain. Designed with Shimano’s renowned durability, it’s ideal for recreational and everyday riding. Smooth, Stable Operation: Featuring cartridge bearings, the BB-UN300 offers smoother rotation and reduced friction over extended use. Its internal construction ensures a sealed, maintenance-free experience that stands up to weather and debris. Improved Chainline Stability: The integrated chain line stabilizer helps maintain precise alignment, contributing to better drivetrain performance and gear shifting. This feature is especially valuable in keeping your ride efficient and responsive. Multiple Structure Options: Whether you ride with a standard setup, E-type front derailleur, or chain case, the BB-UN300 supports all three configurations. This makes it a flexible upgrade or replacement for a wide range of bicycles. With an aluminum adapter and steel axle, the Shimano BB-UN300 balances strength and weight. It’s a cost-effective solution for riders seeking Shimano reliability without compromising on quality.

The quality and performance-oriented Shimano BB-UN300 cartridge bearing bottom bracket features a JIS square taper mount and is designed for frames with BSA thread and 68/73 mm shell width. A stabilizer ensures a constant chain line. Features Fits JIS square-taper cranksets Crankarm fixing bolts sold separately Hollow spindle Adapter: aluminium (left), aluminium / steel (right) Axle: steel Additional Info Country of Origin: Malaysia/Japan Imported By: Shimano South Asia Pvt Ltd. , 19 , (Ground Floor) Kumara Krupa Road , Bangalore – 560 001 , Karnataka , India. Net Quantity: 1N Customer Care Address: 291, 10 Main, 5 Block, Jayanagar, Bangalore - 560041. Ph: (080)47183232, Email: support@bumsonthesaddle.com Commodity: Bottom Brackets

The Shimano Tiagra BB-RS501 bottom bracket is designed for use with Hollowtech II cranksets and standard threaded BSA frames. It fits 68mm and 70mm shell widths, making it compatible with a wide range of road bikes. Improved Sealing for Longevity: Engineered with Shimano’s new seal construction, this bottom bracket is built to reduce water and dirt ingress. The enhanced sealing helps maintain smooth rotation over time, minimizing wear and increasing durability. Optimized for Performance and Efficiency: The BB-RS501 offers a stiff and stable platform for the crankset, enabling efficient power transfer with every pedal stroke. It ensures a secure fit and optimal bearing alignment to reduce energy loss. Trusted Hollowtech II Design: Shimano’s Hollowtech II system integrates the bottom bracket and crank arm to provide a lightweight and high-performance interface. This bottom bracket delivers on that promise with easy installation and low maintenance. Whether you're upgrading or replacing a worn-out part, the BB-RS501 is a dependable choice for road cyclists looking for value, reliability and smooth operation in all conditions.

The Shimano GRX BB-RS500-PB Press-Fit Bottom Bracket is specifically engineered to meet the rigorous demands of gravel riding. Emphasizing long-lasting performance, this bottom bracket is a key component for riders seeking reliability and durability in varied and challenging terrains. Innovative Seal Construction for Enhanced Protection: Featuring a new seal construction, the GRX BB-RS500-PB bottom bracket is designed to offer superior protection against the elements. This innovative design keeps out dirt, mud, and water more effectively, ensuring that the internal components remain clean and functional over time. The result is a bottom bracket that requires less maintenance and offers greater longevity. Press-Fit Design for Smooth Installation: The press-fit design of this bottom bracket not only facilitates smooth and easy installation but also contributes to the overall stiffness and efficiency of the drivetrain. By ensuring a snug fit within the frame, the BB-RS500-PB enhances power transfer, allowing riders to make the most of their effort on the pedals. Compatibility and Versatility: The Shimano GRX BB-RS500-PB Press-Fit Bottom Bracket is compatible with a wide range of Shimano GRX cranksets and frames that accommodate press-fit standards. This versatility makes it an excellent choice for riders looking to upgrade their gravel bikes with components that offer the perfect blend of performance and durability. Whether tackling long gravel races or exploring backcountry roads, this bottom bracket is designed to keep you rolling smoothly and reliably, ride after ride.

Shimano Tiagra Bottom Bracket BB-RS500 Shimano Tiagra - Bottom Bracket - Threaded - Hollowtech II - 68/70 mm shell width Uncompromised Performance: Crafted with Shimano's renowned engineering, the Tiagra Bottom Bracket BB-RS500 guarantees unrivaled performance. Its innovative Hollowtech II technology enhances stiffness and reduces weight, translating into more efficient power transfer with each pedal stroke. Perfect Fit & Compatibility: Designed for threaded bottom bracket shells with 68/70 mm width, this bottom bracket effortlessly fits a wide range of frames. Say goodbye to compatibility worries and embrace a seamless integration into your existing setup. Built to Last: The Shimano Tiagra Bottom Bracket BB-RS500 comes equipped with a new seal construction that ensures exceptional longevity. Enjoy long-lasting performance on your rides, with minimal maintenance required. Smooth & Silent Riding: Benefit from the bottom bracket's precision-engineered bearings, which deliver a smooth and silent cycling experience. Focus solely on your ride, as the BB-RS500 efficiently reduces friction for an uninterrupted journey. Trust in Shimano's Legacy: As a global leader in cycling components, Shimano is a name synonymous with reliability and innovation. With the Tiagra Bottom Bracket BB-RS500, you can trust in Shimano's legacy and elevate your cycling adventures with confidence. Easy Installation & Maintenance: With its user-friendly design, installation and maintenance are a breeze. The threaded bottom bracket system ensures straightforward setup, and the new seal construction simplifies maintenance, leaving you more time to enjoy the open road. Specifications Specifications of Shimano Bottom Bracket BB-RS500 Model No BB-RS500 Series Tiagra 4700 Series Average weight 92 HollowTech II Bottom Bracket|Threaded Bottom Bracket Type Yes Threaded Bottom Bracket Shell Width (mm)_68 Yes Threaded Bottom Bracket Shell Width (mm)_70 Yes Technology Technology of Shimano Bottom Bracket BB-RS500 HollowTech II: Providing the best balance of stiffness, strength, weight and rotating performance The concept of Hollowtech II technology is focused on producing a superior crankset which will maximize a rider’s power transfer. The rigidity of the crankset ensures pedaling efficiency while its weight, a key element of the crankset, you want light, aids in cycling longer distances over which the rider needs to pedal more. Naturally, Shimano strove for the optimum balance between the conflicting needs of stiffness while producing a lightweight crank. Hollowtech technology is an ultra-lightweight hollow crankarm created by Shimano with the company’s own proprietary forging technology that also maintains rigidity. The addition of Hollowtech II technology integrates the bottom bracket axle with the right crankarm for more stiffness and a weight savings to achieve a high-dimensional balance. Its outboard bottom bracket bearing system provides better weight distribution and more pedaling stability, allowing for more efficient power transfer. The Hollowtech II crankset has been developed by pursuing the optimum balance of stiffness & rotating performance in a lightweight and beautiful crankset design. High Precision Sealing: Moreover, Hollowtech II crankset has a high-precision sealing in the bearing area to increase durability maintaining the excellent rotating performance for long periods.

With better sealing and rotation the SHIMANO DEORE bottom bracket delivers high driving efficiency. Features Better sealing performance The set includes left and right-hand cups, spacers, an inner cover, and inner O-rings Sealed cups keep out dirt and water Specification Type Threaded Bearing Type  - Length  - Shell Width 68/73mm Thread type BSA Spindle Diameter 68 mm Additional Info Country of Origin: Malaysia/Japan Imported By: Shimano South Asia Pvt Ltd. , 19 , (Ground Floor) Kumara Krupa Road , Bangalore – 560 001 , Karnataka , India. Net Quantity: 1N Customer Care Address: 291, 10 Main, 5 Block, Jayanagar, Bangalore - 560041. Ph: (080)47183232, Email: support@bumsonthesaddle.com Commodity: Bottom Brackets

The CeramicSpeed BB Alpha Bottom Bracket for BB86 Shimano Road is engineered for riders who demand durability and uncompromising efficiency. Designed for BB86 pressfit frames with a 41mm bore and 86mm width, it pairs perfectly with 24mm axle cranksets from Shimano and compatible brands. Ultra-Low Friction Ceramic Performance: Hardened stainless-steel races are hand-built with Grade 3 Silicon Nitride ceramic balls to deliver exceptionally smooth rotation. This minimizes friction and maximizes power transfer, helping you convert every watt into forward speed. Advanced Moisture & Bearing Protection: Custom-engineered seals and precision dust covers provide up to 500% better moisture protection compared to previous generations. The corrosion-resistant design keeps contaminants out, ensuring consistent performance in all riding conditions. Lighter Design, Faster Installation: A simplified spacer tube system and lighter cups reduce overall weight by 10% while enabling quicker and more precise installation. The serviceable construction makes long-term maintenance straightforward and reliable. Backed by a lifetime warranty, the CeramicSpeed BB Alpha Bottom Bracket for BB86 Shimano Road delivers elite-level performance that lasts season after season.

The Shimano Acera BB-ES300 Octalink bottom bracket is specifically designed for mountain biking and touring bikes, providing a sturdy and reliable foundation for your ride. Its compatibility with 8-speed gearing ensures smooth and efficient performance across a range of terrains. Lightweight Design: One of the key upgrades in the BB-ES300 model is its weight reduction. Compared to its predecessor, the BB-ES25, this bottom bracket offers a significant weight saving of up to 25 grams, contributing to better overall bike performance without compromising on durability. Compatibility: This bottom bracket is designed to fit MTB and touring cranks with a BSA bottom bracket shell width of 68 or 73 mm. However, it is important to note that it is not compatible with E-Type or chain case systems, making it best suited for riders who prioritize simplicity and performance. Durable Construction: The Octalink system ensures that the crank arms are securely fastened to the bottom bracket, minimizing movement and enhancing overall pedaling efficiency. Shimano's focus on durability means this bottom bracket will withstand the rigors of challenging off-road and touring conditions. It’s a great choice for riders looking for a cost-effective upgrade or replacement for their existing bottom bracket, offering Shimano's trusted performance at an affordable price.

The Shimano 105 BB-5500 is a long-standing Octalink bottom bracket known for its reliability and smooth performance. It continues to provide excellent service for cyclists, even after years of consistent use. Compatibility with Crankset Types: The 105 BB-5500 comes in two axle lengths, 109.5 mm and 118.5 mm, catering to 2-way and 3-way cranks, respectively. This versatility makes it an ideal choice for a variety of 8-speed drivetrain setups. Robust Construction: Featuring a steel axle and high-quality materials, this bottom bracket is built to withstand the demands of road cycling. Its durable design ensures long-lasting operation, even under challenging conditions. Precise Fit Options: The BB-5500 is available in multiple configurations to suit different bottom bracket shells, including 68 mm (BC1.37) and 70 mm (M36) versions. These options allow for seamless integration into a wide range of bike frames. Despite its age, the Shimano 105 BB-5500 continues to hold up as a reliable and efficient bottom bracket for 8-speed gearing, proving its timeless value for road cyclists.

  MTB BSA frame / BB shell width 68/73 mm. with 30mm diameter cranks spindle. #6806 ceramic bearings. Shimano BSA / fits 30mm cranks in BSA bottom bracket shells.

ROAD Racing Spacers*2 BB Shell Width 68  

AEROZINE PF30 → BSA Adapter The simplest modification method. Hassle-free! Retains the original BSA bottom bracket, ready to use with a simple conversion, stable and lightweight.

  Road BSA frame / BB shell width 68 mm. with 30mm diameter cranks spindle. #6806 bearings. Shimano BSA / fits 30mm cranks in BSA bottom bracket shells.

  BB86 BB89.5 BB92 frame. with 24mm diameter cranks spindle. #6805 ceramic bearings.

BSA frame / BB shell width 68mm for ROAD with 30mm diameter cranks spindle. #6806 ceramic bearings

BSA ITA24-C Bottom Brackets for Road racing (Italian thread)