Bike hubs are the central part of a bicycle's wheel, connecting the spokes to the axle and allowing the wheel to spin. There are two main types of bike hubs:

  1. The first type is the standard hub, which consists of a center axle and two sets of bearings (one on each side) that allow the wheel to spin. These bearings are typically sealed to protect them from dirt and debris.
  2. The second type is the internal geared hub, which has a complex set of gears and a shifting mechanism inside the hub. This type of hub allows for multiple gear options, but also requires more maintenance than a standard hub.

To determine your bike hub size, you will need to measure the distance between the outermost points of the locknuts on the axle. This measurement is called the overlocknut dimension (OLD) and is the most commonly used measurement for bike hub size. The OLD measurement can be found in the bike's specifications, or you can measure it yourself using a caliper or a ruler.

In general, bike hubs are an important part of your bike's overall performance and durability. Standard hubs are simple and easy to maintain, but internal geared hubs offer more versatility and gear options. However, it's important to keep in mind that internal geared hubs require more maintenance and are typically more expensive.

When it comes to choosing a bike hub, it's important to consider your riding style and the type of terrain you'll be riding on. If you're mostly riding on flat or paved surfaces, a standard hub will likely be sufficient. However, if you're planning on riding in hilly or mountainous areas, or if you want more gear options for different types of riding, an internal geared hub may be a better choice.

Additionally, it's also important to consider the weight of your bike when choosing a hub. Standard hubs are typically lighter than internal geared hubs, so if you're looking to reduce the weight of your bike, a standard hub may be a better choice.

Ultimately, the choice between a standard or internal geared hub will depend on your individual needs and preferences as a rider. Both types of hubs have their own unique benefits and drawbacks, so it's important to carefully consider your options before making a decision.

In conclusion, bike hubs are a crucial part of a bicycle's performance and durability. The two main types of bike hubs are standard hubs and internal geared hubs. Standard hubs are simple and easy to maintain, but internal geared hubs offer more versatility and gear options. When choosing a bike hub, it's important to consider your riding style, the type of terrain you'll be riding on, and the weight of your bike. With the right choice of bike hub, you can ensure a smooth and enjoyable riding experience.

BikeBike hubInternal geared hubOverlocknut dimension (old)Riding styleStandard hub