Tuesday, July 13, 2010

TYRE CALSSES

Pneumatic tyres vary widely in size and weight with cross sections ranging from 1



inch to 21 inches. The most important functions of a tyre used in the automobile industry


are to absorb shock, and so reduce wear on vehicle and road and to grip the road for


braking, steering and transmission of power.


The main classes of tyre include-Car, Giant, Agricultural and Industrial, Aircraft,


Motor cycle and Cycle.


Also the tyres are classified as summer, winter or all season tyres.






Summer tyres- The main characteristic of a summer tyre is excellent driving and braking


performance on both dry and wet roads, in temperatures above freezing in all seasons. A


simple block shaped tread pattern ensures that it maintains maximum grip on a road


surface at all times.






Winter tyres-The winter tyre is suitable for ice and snow covered roads. The tread is


heavily siped, fine block design with grooves that are deep and wide providing excellent


traction and braking performance on such roads. The tread rubber used here is having


better friction characteristics and retains suppleness even at low temperatures.
 
All season tyres-These tyres are more complicated than summer tyres because of the



longer block edge for winter usage. More sipes occur in all season tyres than summer


tyres to improve traction and braking performance by maximizing the effect of edge.
 

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