MTB stem caps, also known as headset top caps, are small caps that screw onto the top of the steering tube on your mountain bike. They serve two main purposes:

  • Function: The primary function of a stem cap is to compress the top headset bearing and pr-eload it. This keeps the headset bearings properly adjusted, reducing friction and ensuring smooth steering.
  • Aesthetics: Stem caps can also be a way to add a personal touch to your bike. They come in a wide variety of colours, materials, and designs, so you can find one that matches your style.

Here are some things to consider when choosing an MTB stem cap:

  • Size: Stem caps come in two standard sizes: 1 1/8″ and 1.5″. Make sure to choose a cap that is compatible with the steering tube diameter of your fork.
  • Material: Stem caps are typically made from aluminium, plastic, or carbon fibre. Aluminium is the most common material, as it is strong, lightweight, and affordable. Plastic caps are less expensive but may not be as durable. Carbon fibre caps are the lightest option, but they are also the most expensive.
  • Colour and design: As mentioned, stem caps come in a wide variety of colours and designs. You can find caps with logos, graphics, or even custom designs.

If you are looking for a new stem cap for your MTB, there are a few places you can look:

  • Bike shops: Most bike shops will carry a selection of stem caps.
  • Online retailers: Here at mountain bike hippo you can find a wider selection.
  • Custom manufacturers: There are also a number of companies that make custom stem caps. These can be a great way to get a unique cap that matches your style.