The rim is a part of the wheel in which the tire is fixedly mounted.

Update:29-11-2018
Summary:

The rim is a part of the wheel in which the tire is fix […]

The rim is a part of the wheel in which the tire is fixedly mounted.

The hub is a rotating component that is responsible for the load between the tire and the axle that connects the wheel and the axle. The spokes are part of the support rim and the hub.

If you use aluminum alloy, it is called aluminum alloy rim and wheel hub.
Through continuous improvement, under the conditions of modern industrial technology, the hub has become a fully functional integral component. It bears the functions of carrying weight, transmitting power, heat dissipation of the tire, etc., and as a rotating moving part, the wheel hub must have certain rigidity, and must meet the requirements of light weight, fatigue resistance and dynamic balance. Compared with the past steel wheels, Otr wheel rims Manufacturers the aluminum alloy wheels have a significant weight reduction: the same size and strength, the aluminum alloy wheels are about half the mass of the steel wheels. Lightweight aluminum alloy wheels provide better vehicle power performance while saving fuel and heat dissipation.

a little popular image

The rim is the outermost circle of the metal part of the wheel, or the rim. The hub is the innermost circle of the metal part of the wheel.

There are several poles between the innermost and outermost two turns, called spokes, like bicycles and steel wires.

The rim is in contact with the tire. The hub is in contact with the axle or the knuckle. The rim and the hub are linked by the web. There are very few links on the car.

Most of the wheel covers refer to steel wheels used in some low-end models, but there is a decorative item made of aluminum or other materials on the outside, which has a shape like aluminum wheels.

The rim is part of the wheel and refers to the part that is in contact with the tire. The wheel is the wheel that is usually said.