Rim-mounted rubber strip, wheel rim. A rim strip is a thin strip of rubber or other material that is placed inside the wheel rim to protect the inner tube from the sharp edges of the spoke nipples. The strip sits between the inner tube and the spoke nipples, cushioning the inner tube and preventing it from being punctured or damaged by the nipples.
Rim straps are available in different widths and thicknesses to fit different rim sizes and depths. They are available in a variety of materials, including rubber and plastic. They are easy to install and remove, and can be replaced if they become worn or damaged.
Rim straps are an important part of the wheel system, helping to prevent punctures and other problems that can arise as a result of the spoke nipples coming into contact with the inner tube. Without a properly installed rim strap, the inner tube can become damaged and require more frequent replacement.
In addition to protecting the inner tube, rim straps also serve other purposes, such as:
Note that not all wheels require rim straps. Some modern rims have a built-in rim strip that is molded into the rim during the manufacturing process, and such wheels do not need additional protection.