Wheel rim device

A wheel rim device adapted to be mounted on an axle of a vehicle and to be signally connected to a host computer of a tire pressure device, and adapted for a tire pressure detector of the tire pressure device to be mounted thereon, comprising:

• a wheel rim body adapted to be mounted on the axle and adapted for the tire pressure detector to be mounted thereon;
• an electric power generating mechanism mounted to said wheel rim body and configured to be driven by said wheel rim body to rotate to generate electric power;
• and
• a tire pressure indicator mounted to said wheel rim body and including a wireless communication module, a light emitting module with a plurality of light-emission modes, a control module that is signally connected to said wireless communication module and said light emitting module, and a power storage module that is electrically coupled to said electric power generating mechanism to store the electric power generated by said electric power generating mechanism, that is electrically coupled to said wireless communication module, said light emitting module, and said control module to supply the electric power, said wireless communication module being adapted to wirelessly receive a tire pressure value signal that indicates a tire pressure value and that is transmitted by the host computer, said control module being configured to, after the tire pressure value signal is received, control said light emitting module to emit light in one of the light-emission modes according to the tire pressure value.