High-quality bottom brackets and internal bearings for road bikes, mountain bikes, gravel bikes and e-bikes – with precise fit for all common standards from Shimano, SRAM, Campagnolo, FSA and other top brands.
In this category you will find bottom brackets, internal bearings and bottom brackets for almost every bicycle frame and crank standard – from classic BSA threaded bottom brackets to press-fit systems and modern DUB and T47 solutions. Whether you are looking for a Shimano Hollowtech II bottom bracket, an SRAM DUB internal bearing, a Campagnolo Ultratorque bottom bracket or a high-quality Chris King internal bearing: the range covers all common shell widths, spindle diameters and bearing standards – with fast delivery to all of Switzerland and the Principality of Liechtenstein.
Buy bottom brackets online – precise fit for every frame
A perfectly matched bottom bracket ensures efficient power transmission, smooth crank rotation and long service life. The key factors are the frame’s shell type, shell width, crank spindle diameter and desired bearing quality. The range includes both proven original equipment and high-quality upgrade bearings with special seals for year-round use in wet and dirty conditions.
Bottom brackets by installation type
For threaded shells to BSA standard (68 mm / 73 mm) or Italian ITA thread (70 mm), robust, easy-to-service bottom brackets with screw-in bearing cups are available. Press-fit bottom brackets cover the standards PF30, PF92, PF86, BB30 and BB86/BB92. Modern systems like T47 combine the advantages of threading with a large bearing diameter. Matching internal bearings are available for SRAM DUB, Shimano Hollowtech II, Campagnolo Ultratorque and FSA cranks.
Bottom brackets for e-bikes and pedelecs
E-bikes and pedelecs place higher demands on the bottom bracket due to motor assistance. Special e-bike-compatible internal bearings from FSA, Shimano and Praxis Works are designed for the higher torques and offer reinforced bearings and improved sealing against moisture and dust – for permanently reliable operation even under intensive use.
This category is aimed at cyclists and hobby mechanics in Switzerland who want to replace a worn bottom bracket, install an upgrade for more efficient crank running, or need a new internal bearing for a frame build. Thanks to the broad coverage of all common standards, both beginners and experienced mechanics will find the right bottom bracket – with emparo’s usual fast delivery.
Quality, installation & compatibility
When buying a bottom bracket, the correct shell standard, the matching shell width and the crank spindle diameter are crucial. Sealed industrial bearings, precisely manufactured bearing cups and high-quality seals increase service life and protect against penetrating dirt and water – especially during rides in the rain or on gravel roads.
Frequently asked questions
What is a bottom bracket and what is its function on a bicycle?▾
The bottom bracket, also referred to as the internal bottom bracket or bottom bracket, connects the crank arms to the bicycle frame and enables the low-friction, power-transmitting rotational movement when pedaling. It sits in the bottom bracket shell of the frame and houses the crank spindle – a central component for efficiency and riding comfort.
What bottom bracket standards are there and how do they differ?▾
The most common standards are BSA (threaded), ITA (Italian thread), press-fit (PF30, PF92, PF86), BB30, PF30, BB86/BB92, T47 and DUB. They differ in shell width, bearing diameter, installation method and crank spindle diameter. For compatibility, the frame type, crank and bottom bracket must be precisely matched.
How do I find the right bottom bracket for my bicycle?▾
First determine the frame’s shell type – threaded (BSA/ITA) or press-fit – and measure the shell width and inner diameter. Then consider the crank spindle: spindle diameter (24 mm, 30 mm, DUB) and crank manufacturer (Shimano, SRAM, Campagnolo, etc.). If in doubt, the technical specifications of the frame or crank manufacturer will help.
What is the difference between Shimano and SRAM bottom brackets?▾
Shimano uses Hollowtech II cranks with a 24 mm steel spindle that runs in BSA and press-fit bottom brackets – proven and easy to service. SRAM relies on the DUB system with a 28.99 mm aluminium spindle, offering greater bearing volume and stiffness. Both systems are powerful, but differ in installation, compatibility and spindle diameter.
How do I recognise a defective bottom bracket?▾
Typical signs include creaking, clicking or grinding noises when pedaling, noticeable bearing play at the crank, stiff crank rotation, and lateral wobble of the crank arms. Ingress of moisture and traces of rust on the bearing cups also indicate a worn bottom bracket that should be replaced promptly.
Can I change a bottom bracket myself or do I need special tools?▾
Replacing a bottom bracket is quite feasible with the right special tools. You will need a bottom bracket wrench or internal bearing tool, a torque wrench and, depending on the system, a puller. Careful work is particularly important with press-fit bearings to avoid damaging the frame and bearing seats. If in doubt, a visit to a specialist workshop is recommended.
What does bottom bracket width mean and how do I measure it?▾
Bottom bracket width refers to the length of the bottom bracket shell on the frame, measured from outside to outside. Common widths are 68 mm and 73 mm (BSA), 70 mm (ITA) or 86.5 mm and 92 mm (press-fit). It is measured with a calliper directly on the frame, without bearing cups. The correct width is crucial for selecting the right bottom bracket.
Which bottom bracket is suitable for e-bikes and pedelecs?▾
Bottom brackets with increased load capacity and sealed bearings are recommended for e-bikes and pedelecs, as motor assistance transmits higher torques to the bottom bracket. Brands such as FSA, Shimano (Steps-compatible) and Praxis Works offer specially reinforced e-bike bottom brackets designed for durability and low maintenance.
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