Shop Shimano Bottom Brackets at BIKE24
Shimano bottom brackets are the hidden backbone of your drivetrain. Whether you’re racing on the road or pushing hard on the trail, the bottom bracket plays a key role in power transfer, stiffness and long-term performance. And this is exactly where Shimano bottom brackets shine. With the introduction of Hollowtech II, Shimano defined the modern standard for bottom brackets: external bearings paired with a 24 mm axle integrated into the right crank arm, delivering a balanced combination of stiffness, low weight and smooth rotation. Add advanced sealing technologies, and you get exceptional durability even under tough conditions.
From high-end Pressfit bottom brackets for road bikes to robust BSA MTB models and classic square taper or Octalink options, Shimano offers the right bottom bracket solution for your drivetrain.
Your Advantages with a Shimano Bottom Bracket
Hollowtech II principle: external bearings, optimized seals and the deliberate choice of a 24 mm axle deliver efficient performance for ambitious setups
Maximum system integration: every Shimano bottom bracket is perfectly matched to its corresponding crankset
Reliable sealing: Advanced Seal Construction ensures long-lasting durability under load
Wide range: available for every performance group from Deore to Dura-Ace
From Road to MTB – Shimano Bottom Brackets at a Glance
Shimano doesn’t present its bottom brackets as isolated product lines but as precisely matched service and upgrade parts for each drivetrain group. In practice, they fit into a few well-defined technical families:
Shimano Hollowtech II – External BSA Bottom Brackets (24 mm axle)
Shimano’s modern bottom brackets are built around external bearings engineered for 24 mm crank spindles. These models cover nearly the entire performance range, from 105 and Tiagra to GRX and Deore, all the way up to Dura-Ace and XTR. While the branding differs by group, all versions follow the same proven Hollowtech II principle.
Shimano Hollowtech II – Pressfit Bottom Brackets
Many carbon and aluminum frames rely on Pressfit standards. Shimano offers dedicated Pressfit bottom brackets that are pressed directly into the frame shell. With widely spaced bearings, they deliver highly efficient power transfer and increased stiffness.
Shimano Square Taper and Octalink Bottom Brackets
For classic square taper and Octalink cranksets on everyday bikes, Shimano provides a wide selection of bottom brackets that combine durability with versatility. Fully sealed bearings and multiple configurations (standard, E-Type and chaincase versions), plus numerous axle lengths (107–127 mm) and shell widths (68/73 mm), cover virtually every traditional frame standard.
Shimano Bottom Bracket Technologies – Innovation for Maximum Performance
Shimano develops its bottom brackets with a clear focus on engineering excellence. From bearing design and sealing technology to axle geometry, every detail is optimized for performance, durability and system integration.
- Hollowtech II: While other manufacturers rely on 30 mm or DUB axles, Shimano intentionally remains committed to the 24 mm standard, offering what they consider the best overall balance of stiffness, weight, performance and longevity.
- Advanced Seal Construction: Shimano prioritizes sealing quality across all groups. Multiple sealing lips, tight tolerances and high-grade materials protect the bearings from dirt, water and wear. That means longer intervals between services, even when you ride in tough conditions.
Order Your Shimano Bottom Bracket at BIKE24
At BIKE24, you’ll find the complete Shimano bottom bracket range for every discipline and drivetrain. Our expert team is happy to help you choose the right model and ensure compatibility with your setup. With fast shipping, your new Shimano bottom bracket will be with you in just a few days, safely packed and ready to install.
If you also need matching cranksets, chainrings or the right tools, you’ll find everything in one place. Discover your new Shimano bottom bracket now, order it conveniently online and take your drivetrain to the next level.