Analysis of information sources in references of the Wikipedia article "MR-63" in English language version.
The idea for tires came to Drapeau and Saulnier when they visited Paris, the first subway system to incorporate tires to address a problem of overcrowding. Supplied by Michelin, the rubber allowed trains to accelerate faster, which in turn allowed for more trains to run on a given line.
1963: Canadian Vickers wins the contract to build 369 MR-63 métro cars. It delivers the first cars on Aug. 24, 1965.