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A tyre is a ring-shaped component that covers the wheel's rim to protect it. It enables better vehicle performance by providing traction between the vehicle and road, acting as a flexible cushion that absorbs shock.
A tyre helps the vehicle in various ways:
Supports vehicle weight
Transfers traction & braking forces to the road surface
Provides direction & stability to vehicle
Provides comfort by absorbing road shocks
Shoulder: Located between the tread and sidewall, it is the thickest part to allow easy diffusion of heat generated within the tyre while driving.
Sidewall: Bridges tread and bead - largely rubber but reinforced with fabric or steel cords to provide tensile strength and flexibility.
Tread: Made of thick rubber or rubber/composite as it touches the road surface.
Bead: Attaches tyre to the rim & wraps the end of the cord fabric. Comprising bead wire, core, flipper etc, it is generally tight around the rim to prevent the tyre from falling off the rim in the case of a sudden drop in inflation pressure.
18.00: Nominal tyre width in inches.
25: Required Nominal Rim Diameter
E4: TRA Code signifying application and tread depth
|There are three types of tyres:|
|1. Metal tyres: Used on locomotives and railcars|
|2. Solid tyres (rubber or other polymer): Used in various non-automotive & Industrial applications such as some casters, carts, lawnmowers and wheelbarrows.|
|3. Pneumatic tyres: Used on various types of vehicles, including cars, bicycles, motorcycles, trucks, earthmovers and aircraft. These are further classified as:|
|o Radial (Tube and Tubeless)|
|What are the tyre patterns?|
What are bias tyres?
- A bias tyre utilises body ply cords that extend diagonally from bead to bead.
-The angle of cords range from 25 to 45º.
What are radial tyres?
In radial tyres, the cord plies are arranged at 90 degrees to the centre line of thread
Tube-type tyres consist of a tube which is placed between the tyre and the wheel rim.
Tubeless tyres are pneumatic tires that do not require a separate inner tube.
Retread also known as recap or a remould is a remanufacturing process for tyres that replace the tread on worn tyres.