The present invention discloses a rubber composition, a processing method thereof, and a foamed rubber product produced by the rubber composition and a production method thereof. The rubber composition comprises a rubber matrix and essential components, wherein, based on 100 parts by weight of the rubber matrix, the rubber matrix comprises a branched polyethylene with a content represented as A, in which 0<A100 parts; and an EPM and an EPDM with a total content represented as B, in which 0B<100 parts, and the essential components comprises 0.5-10 parts of a crosslinking agent, and 1.5-25 parts of a foaming agent. The rubber composition is useful in the production of sponge seal strip, foamed rubber compound of high expansion ratio, shock absorbing foamed rubber sheet, light-colored high-strength foamed sheet, foam-solid composite seal strip, and solid cycle tires internally filled with foamed elastomer. The branched polyethylene replaces a part or all of the ethylene-propylene rubber in the foaming rubber composition, which can increase the melt strength, the foamability and particularly the pre-foamability of the rubber composition, and make the rubber product has a lower compression set.

There is provided a piece for a modular tyre liner, the piece being planar and generally rectangular and cut to define: a key head and a key hole, the key head configured for insertion into an associated key hole of an adjacent piece for engagement in use to form a mechanical interlock with the adjacent piece and wherein the key head and a key hole are configured for allowing movement of the piece with respect to the adjacent piece along the length of the liner in use.

Provided is bead fiber with which sufficient air volume can be infused for making a high-performance bicycle tire, which has superior workability that does not require drying of the bead fibers when covering the bead fibers with rubber, and which is effective in preventing rim detachment. A high-performance bicycle tire can be obtained by using this tire bead fiber. The tire bead fiber is characterized by being formed using wholly aromatic polyester fiber with a modulus of elasticity of 800 cN/dt or greater.

A green bike comprises a frame, two wheels, a first internal-gear module and a second internal-gear module and a transmission element. The frame has a pedal, a front supporting unit, a rear supporting unit, and a seat unit. The two wheels are attached to the front supporting unit and the rear supporting unit, respectively. The transmission element is disposed in the frame or a tube shield linking to the frame. The first internal-gear module and the second internal-gear module are coupled with the pedal and at least one of the wheels. The transmission element links the first and the second internal-gear modules for delivering power to the at least one of the wheels.

The invention is directed to a valve stem system (1) for tubeless wheels. The valve stem system (1) includes a valve stem body (2) with a first end (3) and a second end (4), wherein the second end (4) is located in a tire/rim-volume when mounted at the wheel. A first valve (5) is arranged at the second end (4) of the valve stem body (2). The first valve (5) is a self-sealing one-way valve. A second valve (10) is removably mountable at the first end (3) and is, when mounted, at least partially housed in the valve stem body (2). The second valve (10) comprises a valve stem core inserted in the valve stem body (2) and can be added or removed from the valve stem body (2) while pressure is maintained within the tire by the first valve (5). The invention further concerns a probe (30) for a valve stem system, a method to test the amount of sealant in a wheel and a refilling assembly (80) for a wheel.

A device for measuring a liquid level inside a tire that include two electrodes that are designed to be positioned inside the tire in such a way that they can be immersed inside the liquid that the tire may contain, and an electric circuit that is electrically connected to these electrodes. The device is designed to measure an electric property of the liquid between the electrodes while the intensity of the electric property depends on the liquid level inside the tire. The electric circuit is designed to output an electric value for the measured electric property as an output signal that can be used to calculate the level of the liquid inside the tire.

A tire inflation valve having anti-rotation features has an external valve seat, and includes a valve body, a valve stem extending through the length of the valve body, and anti-rotation features disposed interior to the valve body. The valve stem is configured to move relative to the valve body, such that a resilient seating surface disposed at a proximal end of the valve stem is displaced relative to a valve seat formed by an exterior surface of a proximal end of the valve body. The anti-rotation features may include a complementary slot and protrusion, a keyway and complementary protruding ridge, and/or complementary channels and lateral protrusions.

A tire includes a sipe, on a surface of a tread of a tire, extending across a tire equator from one side to another side of the tire equator. An end of the sipe on at least the one side is located at a tread edge or near the tread edge, and an inclination angle of the sipe relative to a width direction of the tread decreases from the tire equator towards the tread edge.

An air deflector that is at least partially disposable within a tubeless tire of a bicycle wheel includes a body. The body includes at least one wall defining an air input end and an air output end of the body. The body is attachable to a valve of the tubeless tire at the air input end, such that when air is introduced into the body via the valve, at least some of the air is deflectable by one or more walls of the at least one wall out of the body at the air output end.

In regions, divided by the tire equator, on both sides of the tread surface of a tire, the tire includes a grip area along the entire circumference of the tread, the grip area including a plurality of recessed lines, with a shape recessed toward an inner side of the tire from the outline of the tread surface, that extend from the tread edge side in a direction inclined relative to the tire equator and are arrayed in parallel, and a plurality of sipes that extend toward the tire equator in a direction inclined relative to the tire equator, starting in the grip area and terminating before the tire equator. The negative ratio in the grip area is higher than the negative ratio closer to the tire equator than the grip area.