TYRE SIZE DESIGNATION

BIAS TYRE

Ex:5.90-15 6PR





5.90 - Thickness of Tyre from shoulder to shoulder is 5.90 inches

15 - Rim diameter 15 inches

PR - Ply Rating - Means Maximum recommended load which the Tyre can carry

RADIAL TYRE

Ex:185/60 R14 82H


185 - Thickness of Tyre from shoulder to shoulder is 185 mm.

60 - Aspect ratio* is 60%.

R - Means Radial Tyre.

14 - Wheel rim diameter 12 inches.

82 - Load index is 82. The maximum load a Tyre can carry.

H - The Speed symbol. Maximum speed of Tyre.

* ASPECT RATIO

Aspect Ratio - Ratio of section height to section width

TYRE

TYRE

• It carry the vehicle weight
• It transfers the traction and braking force
• It changes and maintain the direction of travel

• it absorbs Road Shock
  

ADVANTAGES OF RADIAL TYRES OVER BIAS TYRE

BETTER SAFETY: The braking efficiency of radial tires on wet roads is better due to stiffer tread and greater side wall flexibility.

BETTER CONTROL: On turning, a radial Tyre has less tendency to distort and lift off the road from one side. Thus, there is better contact of Tyre and hence stability

LESS PUNCTURE TENDENCY: The Radial tires are provided with dual steel belts due to which there is a less tendency of puncture

LOWER FUEL CONSUMPTION: The rolling resistance of radial Tyre is owe due to which sidewall rigidity and stiffer tread

GREATER RESISTANCE TO WEAR: Less slip and less internal losses life of Tyre increased

The advantage of bias ply Tyre over Radial Tyre is smoother ride at low speed of the vehicle