A tyre 101 comprising an annular expanded rubber body 102 enclosing a concentrically arranged annular cavity 106 containing a fluid (e.g. air), the body 102 having an opening 107 providing fluid communication from outside the tyre body to the cavity 106, and at least one valve 105 for controlling flow of fluid through the opening 107. Preferably, the tyre body comprises a tread surface (103; fig. 2a), a wheel attachment surface (104; fig. 2a), and opposing side wall surfaces, at least the side walls being formed by the expanded rubber body 102. The tread 103 may also be formed by the body 102, or may be a bonded solid rubber part (203; fig. 3a). The body 102 may include a seam (108; fig. 2a) between the cavity 106 and the outer surface of the body, sealed with sealant. There may be an inner tube in the cavity. There may be multiple cavities (e.g. see figures 5-9a, 10a-10b), each including inner tubes. Also disclosed is a wheel assembly comprising a wheel rim and a tyre attached to the wheel rim. The tyre may be suitable for a bicycle (figs 1-4), an automobile (figs 5-9), or a heavy goods vehicle (figs 10a,b).


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    Title :

    Improvements in and relating to tyres


    Publication date :

    2019-05-15


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English



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