Types of Tyres

Depends upon the Skelton of the tyre (carcass),tyres are classified  into

• Cross-ply or bias-ply

• Radial-ply

• Belted-bias type

Cross ply Type:
   
• The ply cords are woven at an angle (30-40degree) to the tyre axis 

• There are ‘2’ layers which run in opposite direction
 
• That lead to rubbing of the two layers 

• Thus produce heat which would damage the tyre material


 Radial ply tyre:
   
• The ply cords run in the radial direction in the direction of the axis
 

• Run a number of breaker strips in circumferential direction 

 

• The material for the breaker strips must be flexible 

 

• Without breaker strips radial tyres would give soft ride

 

 Belted bias type:

   

• It  is a combination of the cross and radial types 

 

• The belts construction is the bias-ply over which a number of breaker belts run 

 

• The stress in the carcass are restricted 

 

• The tread area is stabilized due to belts 

 

• Results in reduction of tread –scrubbing. Increase the tyre life