Very good grip in all weather, especially in the wet.
The cost and fact that they wear faster.
...Two French brothers called Edouard and Andre Michelin, owned a rubber factory. One day, a cyclist with a punctured pneumatic tyre arrived at their factory. This tyre was glued to the rim, and It took over 3 hours to remove it and repair the tyre, which then had to be left overnight to dry. The next day, they took the repaired bicycle into the yard for testing. After several hundred Meters...
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