A Guide to Buying Bike Headset Bearings

A smooth and responsive headset is essential for precise steering and overall bike performance. If your headset feels stiff or wobbly, it might be time for new bearings. At Bicycle Tools UK, we’ve put together this guide to help you choose the right headset bearings for your bike.

What Are Bike Headset Bearings?

Headset bearings allow the steerer tube of your fork to rotate smoothly within the head tube of the frame. Over time, these bearings wear down due to exposure to dirt, water, and general use. If your headset becomes rough or loose, replacing the bearings will restore smooth handling.

Types of Bike Headset Bearings

Threaded Headsets

Threaded headsets were common on older bikes and feature an external thread on the steerer column. Bearings sit in pressed-in cups, and a threaded locknut holds everything in place. Standard sizes include 1-⅛” and 1-¼”.

Threadless Headsets

Threadless headsets are now the most widely used design. They do not have threads on the steerer column and rely on an adjustable top cap and stem to maintain pressure on the bearings. These headsets often use sealed cartridge bearings for durability and require minimal maintenance.

Integrated Headsets

Integrated headsets have bearings that sit directly in the frame without pressed-in cups. They are sometimes called "Campy-style" headsets, a name originating from the brand Campagnolo. These headsets offer a clean look and reduce weight.

Choosing the Right Size

Headset Standards

There are several headset standards, but the most common are:

• 1-1/8" straight steerer – Found on older and entry-level bikes.
• Tapered 1-1/8" to 1.5" steerer – Common on modern bikes, offering increased stiffness.
• 1.5" straight steerer – Less common but provides additional strength.

Measuring Your Head Tube

To ensure compatibility, measure both the upper and lower diameters of your head tube. Some head tubes have different sizes at the top and bottom, especially on bikes with tapered steerers.

Replacing and Maintaining Your Bearings

Regular maintenance can extend the life of your headset bearings. If your headset feels gritty, removing and regreasing the bearings can improve performance. If they still feel rough after cleaning, it’s time to replace them.

At Bicycle Tools UK, we stock high-quality headset bearings from top brands like Acros, NTN, and NSK. Browse our range today and keep your bike steering smoothly!