14 14 © TechSci Research Automotive Tire Demand Replacement Tire Sales Replacement tire demand of a particular country is directly dependent on the country’s vehicle fleet size and historical vehicle sales. The replacement demand is, therefore, extracted by multiplying the vehicle fleet with the replacement tire ratio, which is obtained by conducting a series of surveys with car owners to understand the frequency of tire replacement as it varies for different countries depending upon factors such as road conditions, climate and economic and regulatory policies applicable in a country . The replacement ratio is expressed as a percentage . For example, in case of vans , replacement ratio is considered to be 100 % if four tires are replaced per vehicle per year . Example of vans replacement tire demand calculation : Van Fleet Size (Volume) X Replacement Ratio (%) X No. of Tires = Replacement Tire Demand 1,00,000 X 100% X 4 = 400,000 Tires The calculated replacement tire demand data is further analyzed by TechSci Research through Delphi technique, i . e . , multiple rounds of telephonic interviews were conducted with tire companies’ dealers/distributors, across ASEAN countries . The information thus gathered through primary interviews was cross - verified through industry experts and secondary sources such as annual reports and paid databases to generate meaningful results . Total Tire Market OEM Tire Sales + Replacement Tire Sales = Total Tire Market Research Methodology