Tire assembly for a bicycle rim

A wheel assembly comprising:

• a rim;
• a tire assembly comprising:
• a wheel tire with a tread surface and two tire beads which in a mounted condition respectively bear on interior sides of rim edges;
• an inner tire which in a mounted condition is disposed within the wheel tire;
• a tube which in a mounted condition is disposed within the inner tire;
• and
• a valve arrangement for filling with different fluid pressures, on the one hand, the tube and, on the other hand, an intermediate space defined by the rim and the wheel tire;
• wherein the inner tire in a filled and the mounted condition bears on the tire beads of the wheel tire and presses the tire beads against the rim;
• wherein an insert part is provided which in a mounted condition forms an air duct from the valve arrangement to the intermediate space, the insert part being disposed between the tube and the rim, between the inner tire and the rim, between the tube and the inner tire, and/or between the inner tire and the wheel tire, the insert part comprising a brace including a pair of substantially opposed portions disposed to engage a section of the tube or the inner tire therebetween, and a valve hole extending through the brace substantially centrally of the brace between the opposed portions;
• wherein the valve arrangement includes two separate first and second valves, the first valve being in communication with an interior space of the tube and the second valve being arranged on the brace and being in communication with the air duct, the second valve extending through the valve hole of the brace;
• wherein the rim includes a first valve hole through which the first valve extends and a second valve hole disposed adjacent the valve hole of the brace and through which the second valve extends.

A tire assembly comprising:

• an outer tire including a tread surface and a pair of tire beads;
• an inner tire disposed within the outer tire and having portions disposed adjacent the respective tire beads of the outer tire such that the portions bear against the respective tire beads of the outer tire and press same outwardly and away from one another;
• a tube disposed within the inner tire and defining a hollow interior;
• a valve arrangement for filling the interior of the tube to a first pressure and for filling a space defined within the outer tire to a second pressure different from the first pressure;
• and
• an insert part disposed between the tube and the inner tire or between the inner tire and the outer tire, the insert part including a pair of substantially opposed legs disposed in bracing engagement with a section of the tube or a section of the inner tire, the insert part defining an air duct disposed to provide communication between the valve arrangement and the space within the outer tire, the insert part defining therein a valve hole extending through the insert substantially centrally between the opposed legs.