Model T Ford

• In the USA 30 inch (76 cm) diameter tires were used up to 1926 when 21 inch (53 cm) wire wheels were introduced as an option.
  
  
• The rear tires are 3.5 inch (8.9 cm) wide, the front tires 3 inch (7.6 cm).  Who supplied the first tires? Michelin?
  
  
• Between 1908 and 1925 the wheels were wooden, with steel wire wheels available in 1926-27.     
  
                                          
  
  
• In 1919 30 inch (76 cm) diameter, 3.5 inch (8.9 cm) wide demountable wheels were offered as an option for all the four wheels.
  
  
• All 1927 Model T’s were fitted with 21 inch (53 cm) tires and wheels.
  
  
• Initially (1912-13) the Model T cars assembled in Britain were fitted with metric size (760 mm x 90 mm) tires.  From the 1914 model year 30 x 3 inch (front) and 30 x 3.5 inch (rear) tires were fitted.
  
  
• All Canadian produced Model Ts used 3.5 inch (8.9 cm) tires front and rear. Is that true of the very first Canadian produced cars?
  
  
• From 1918 trucks were supplied with either pneumatic or solid tires.
  
  
• At a meeting of the French Society of Civil Engineers in the early 1900s, Michelin reported: “If the weight of a car is increased by 33% the life of a tire is halved”.
  
  
• In the early 1920s the average life of a tire fitted to a 20 hp car was 3,000 miles (4,800 km). The average life of a tire fitted to a Model T car was 7,000 miles (11,200 km). Is that correct?