Take 185/60R 14 as an example: 185= section width 185mm? 60= aspect ratio 60% R= radial tire structure? 14= the rim diameter is 14 inch.
At present, automobile tires are basically radial tires.
Please refer to/home/buying-guide/tyre-training-centre/tyre-basics/1067 for more tire sidewall identification.
References:
Michelin www.michelin.com.cn, official website.