The size is usually listed in millimeters

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Based on the material, the frame can be divided into engineering plastic frame and aluminum alloy frame; and based on the structure, they can be classified into single-piece frame and split frame. Single-piece aluminum alloy frame can be further divided into casting type and extruded type according to the production process.

In terms of tear resistance, both engineering plastic frames and aluminum alloy frames are quite strong and are unlikely to break unless damaged by human impact or accident. However, for some professional riders who subject their frames to frequent impacts, single-piece aluminum alloy frames or extreme engineering plastic frames are mainly used.

In terms of stability, single-piece frames are generally more stable than split frames. Generally, aluminum alloy frames have the best stability, followed by single-piece engineering plastic namibia number data frames, and then aluminum alloy split frames.

Frame length refers to the distance from the center of the first axle hole of the wheel to the center of the last axle hole. The longer the frame, the better the stability while skating; the shorter the frame, the better the maneuverability. Freestyle skate frames are usually shorter to increase agility, while recreational, urban, and speed skates often choose longer frames to improve stability.

Wheels
Inline skate wheels generally come in three types: PVC plastic wheels, PU polyurethane wheels, and rubber wheels.

PVC plastic wheels are known for their high hardness, but lack cushioning and grip. They are also less resistant to damage. Polyurethane PU wheels have good heat resistance and wear resistance, with better elasticity, so most inline skates use PU wheels. Rubber wheels provide high elasticity, cushioning and shock absorption, providing greater comfort. However, compared to the other two types, rubber wheels have a shorter lifespan and can change their properties depending on the surrounding conditions.