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Rims are crucial components of track bike wheels, providing the necessary structure and support for the tires and spokes. Here is a description of their function, their characteristics, the standards and the different types of rims for track bikes:
Function :
1. Tire support:
Rims provide a surface on which the bicycle's tires can be mounted and held in place.
2. Spoke support:
Rims also provide support for the spokes, which are tensioned between the rim and the wheel hub to maintain its structure and shape.
Features :
1. Material:
Rims can be made from different materials, such as aluminum, carbon or steel. Aluminum rims are the most common due to their weight/strength ratio, while carbon rims are favored for their lightness and rigidity.
2. Height:
Rim height refers to the vertical distance between the bottom of the rim and the highest point of its profile. Track rims can come in different heights, with each height offering specific benefits in terms of weight, aerodynamics and stiffness.
3. Internal width:
The internal width of the rim corresponds to the width of the tread surface where the tire is mounted. A wider internal width can provide better support for wider tires, which can improve comfort and traction.
Standards:
1. Size:
Rims for track bikes come in different diameter sizes, with the most common being 700c and 650c wheel sizes. The rim size must match the tire size to ensure proper fitment.
2. Tire mounting type:
The rims can be designed for mounting tubular or clincher tires. Tubular tires are glued to the rim, while clincher tires are held in place by air pressure.
Different types of rims for track bikes:
1. Tubular rims:
These rims are designed for tubulars, which generally provide better rolling feel and reduced rolling resistance. They are often used in competition due to their lighter weight and aerodynamic profile.
2. Clincher rims:
These rims are designed for tires, which are easier to install and maintain than tubulars. They are often used for training and recreational cycling due to their practicality and versatility.
3. High Profile Rims:
These rims have a higher profile, which can improve the aerodynamics and stiffness of the wheel. They are often used in competition to reduce drag and increase speed.
In summary, track bike rims are essential components of wheels, providing the necessary support for tires and spokes. With specific features such as material, height and width, as well as manufacturing standards, they contribute significantly to the rider's performance and comfort on the track.